Optical imaging system

ABSTRACT

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the first to seventh lenses are spaced apart from each other along the optical axis, and the optical imaging system satisfies 0.4 &lt; L1TR/L7TR &lt; 1.9, where L1TR is an overall outer diameter of the first lens, L7TR is an overall outer diameter of the seventh lens, and L1TR and L7TR are expressed in a same unit of measurement.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of Application No. 17/406,298 filed on Aug. 19, 2021, which is a continuation of Application No. 16/423,218 filed on May 28, 2019, now U.S. Pat. No. 11,181,719 issued on Nov. 23, 2021, and claims the benefit under 35 USC 119(a) of Korean Patent Application Nos. 10-2018-0061410 filed on May 29, 2018, and 10-2018-0106171 filed on Sep. 5, 2018, in the Korean Intellectual Property Office, the entire disclosures of all of which are incorporated herein by reference for all purposes.

BACKGROUND 1. Field

This application relates to an optical imaging system.

2. Description of Related Art

Recently, mobile communications terminals have been provided with camera modules, enabling video calling and image capturing. In addition, as utilization of the camera modules mounted in the mobile communications terminals has increased, camera modules for the mobile communications terminals have gradually been required to have high resolution and performance.

Therefore, the number of lenses included in the camera module has increased. However, since the mobile communications terminal in which the camera module is mounted tends to be miniaturized, it is very difficult to arrange the lenses in the camera module.

Therefore, research into technology capable of performing aberration correction to achieve high resolution and arranging a plurality of lenses in a limited space has been ongoing.

SUMMARY

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the first to seventh lenses are spaced apart from each other along the optical axis, and the optical imaging system satisfies 0.4 < L1TR/L7TR < 1.9, where L1TR is an overall outer diameter of the first lens, L7TR is an overall outer diameter of the seventh lens, and L1TR and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.4 < L1TR/L7TR < 0.7.

The optical imaging system may further satisfy 0.1 < L1w/L7w < 0.3, where L1w is a weight of the first lens, L7w is a weight of the seventh lens, and L1w and L7w are expressed in a same unit of measurement.

The optical imaging system may further include a spacer disposed between the sixth and seventh lenses, and the optical imaging system may further satisfy 0.5 < S6d/f < 1.2, where S6d is an inner diameter of the spacer, f is an overall focal length of the optical imaging system, and S6d and f are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.5 < L1234TRavg/L7TR < 0.75, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.5 < L12345TRavg/L7TR < 0.76, where L12345TRavg is an average value of overall outer diameters of the first to fifth lenses, L7TR is an overall diameter of the seventh lens, and L12345TRavg and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.1 < (1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f < 0.8, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f is an overall focal length of the optical imaging system, and f1, f2, f3, f4, f5, f6, f7, and f are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.1 < (1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL < 1.0, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane, and f1, f2, f3, f4, f5, f6, f7, and TTL are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.2 < TD1/D67< 0.8, where TD1 is a thickness along the optical axis of the first lens, D67 is a distance along the optical axis from an object-side surface of the sixth lens to an image-side surface of the seventh lens, and TD1 and D67 are expressed in a same unit of measurement.

The imaging plane may be an imaging plane of an image sensor, and the optical imaging system may further satisfy TTL ≤ 6.00 mm and 0.6 < TTL/(2*IMG HT) < 0.9, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane of the image sensor, IMG HT is one-half of a diagonal length of the imaging plane of the image sensor, and TTL and IMG HT are expressed in mm.

The optical imaging system may further satisfy 0.2 < ΣSD/ΣTD < 0.7, where ΣSD is a sum of air gaps along the optical axis between the first to seventh lenses, ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses, and ΣSD and ΣTD are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0 < min(f1:f3)/max(f4:f7) < 0.4, where min(f1 :f3) is a minimum value of absolute values of focal lengths of the first to third lenses, max(f4:f7) is a maximum value of absolute values of focal lengths of the fourth to seventh lenses, and min(f1 :f3) and max(f4:f7) are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.4 < ΣTD/TTL < 0.7, where ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses, TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane, and ΣTD and TTL are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.81 < f12/f123 < 0.96, where f12 is a composite focal length of the first and second lenses, f123 is a composite focal length of the first to third lenses, and f12 and f123 are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.6 < f12/f1234 < 0.84, where f12 is a composite focal length of the first and second lenses, f1234 is a composite focal length of the first to fourth lenses, and f12 and f1234 are expressed in a same unit of measurement.

The second lens may have a positive refractive power, and the third lens may have a negative refractive power.

The fifth lens may have a negative refractive power, and a paraxial region of an object-side surface of the fifth lens may be concave or convex.

The fifth lens may have a negative refractive power, and a paraxial region of an image-side surface of the fifth lens may be concave or convex.

A paraxial region of an object-side surface of the sixth lens may be concave or convex.

A paraxial region of an object-side surface of the seventh lens may be concave.

Other features and aspects will be apparent from the following detailed description, the drawings, and the claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a view illustrating a first example of an optical imaging system.

FIG. 2 illustrates aberration curves of the optical imaging system of FIG. 1 .

FIG. 3 is a view illustrating a second example of an optical imaging system.

FIG. 4 illustrates aberration curves of the optical imaging system of FIG. 3 .

FIG. 5 is a view illustrating a third example of an optical imaging system.

FIG. 6 illustrates aberration curves of the optical imaging system of FIG. 5 .

FIG. 7 is a view illustrating a fourth example of an optical imaging system.

FIG. 8 illustrates aberration curves of the optical imaging system of FIG. 7 .

FIG. 9 is a view illustrating a fifth example of an optical imaging system.

FIG. 10 illustrates aberration curves of the optical imaging system of FIG. 9 .

FIG. 11 is a view illustrating a sixth example of an optical imaging system.

FIG. 12 illustrates aberration curves of the optical imaging system of FIG. 11 .

FIG. 13 is a view illustrating a seventh example of an optical imaging system.

FIG. 14 illustrates aberration curves of the optical imaging system of FIG. 13 .

FIG. 15 is a view illustrating an eighth example of an optical imaging system.

FIG. 16 illustrates aberration curves of the optical imaging system of FIG. 15 .

FIG. 17 is a view illustrating a ninth example of an optical imaging system.

FIG. 18 illustrates aberration curves of the optical imaging system of FIG. 17 .

FIG. 19 is a view illustrating a tenth example of an optical imaging system.

FIG. 20 illustrates aberration curves of the optical imaging system of FIG. 19 .

FIG. 21 is a view illustrating an eleventh example of an optical imaging system.

FIG. 22 illustrates aberration curves of the optical imaging system of FIG. 21 .

FIG. 23 is a view illustrating a twelfth example of an optical imaging system.

FIG. 24 illustrates aberration curves of the optical imaging system of FIG. 23 .

FIG. 25 is a view illustrating a thirteenth example of an optical imaging system.

FIG. 26 illustrates aberration curves of the optical imaging system of FIG. 25 .

FIG. 27 is a view illustrating a fourteenth example of an optical imaging system.

FIG. 28 illustrates aberration curves of the optical imaging system of FIG. 27 .

FIG. 29 is a view illustrating a fifteenth example of an optical imaging system.

FIG. 30 illustrates aberration curves of the optical imaging system of FIG. 29 .

FIG. 31 is a view illustrating a sixteenth example of an optical imaging system.

FIG. 32 illustrates aberration curves of the optical imaging system of FIG. 31 .

FIG. 33 is a view illustrating a seventeenth example of an optical imaging system.

FIG. 34 illustrates aberration curves of the optical imaging system of FIG. 33 .

FIG. 35 is a view illustrating an eighteenth example of an optical imaging system.

FIG. 36 illustrates aberration curves of the optical imaging system of FIG. 35 .

FIG. 37 is a view illustrating a nineteenth example of an optical imaging system.

FIG. 38 illustrates aberration curves of the optical imaging system of FIG. 37 .

FIG. 39 is a view illustrating a twentieth example of an optical imaging system.

FIG. 40 illustrates aberration curves of the optical imaging system of FIG. 39 .

FIG. 41 is a view illustrating a twenty-first example of an optical imaging system.

FIG. 42 illustrates aberration curves of the optical imaging system of FIG. 41 .

FIG. 43 is a view illustrating a twenty-second example of an optical imaging system.

FIG. 44 illustrates aberration curves of the optical imaging system of FIG. 43 .

FIG. 45 is a view illustrating a twenty-third example of an optical imaging system.

FIG. 46 illustrates aberration curves of the optical imaging system of FIG. 45 .

FIG. 47 is a view illustrating a twenty-fourth example of an optical imaging system.

FIG. 48 illustrates aberration curves of the optical imaging system of FIG. 47 .

FIG. 49 is a view illustrating a twenty-fifth example of an optical imaging system.

FIG. 50 illustrates aberration curves of the optical imaging system of FIG. 49 .

FIG. 51 is a view illustrating a twenty-sixth example of an optical imaging system.

FIG. 52 illustrates aberration curves of the optical imaging system of FIG. 51 .

FIG. 53 is a view illustrating a twenty-seventh example of an optical imaging system.

FIG. 54 illustrates aberration curves of the optical imaging system of FIG. 53 .

FIG. 55 is a view illustrating a twenty-eighth example of an optical imaging system.

FIG. 56 illustrates aberration curves of the optical imaging system of FIG. 55 .

FIGS. 57 and 58 are cross-sectional views illustrating examples of an optical imaging system and a lens barrel coupled to each other.

FIG. 59 is a cross-sectional view illustrating an example of a shape of a rib of a seventh lens.

FIG. 60 is a cross-sectional view illustrating an example of a seventh lens.

Throughout the drawings and the detailed description, the same reference numerals refer to the same elements. The drawings may not be to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the disclosure of this application. For example, the sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed as will be apparent after an understanding of the disclosure of this application, with the exception of operations necessarily occurring in a certain order. Also, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and/or systems described herein that will be apparent after an understanding of the disclosure of this application.

Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there can be no other elements intervening therebetween.

As used herein, the term “and/or” includes any one and any combination of any two or more of the associated listed items.

Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples.

Spatially relative terms such as “above,” “upper,” “below,” and “lower” may be used herein for ease of description to describe one element’s relationship to another element as shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above” or “upper” relative to another element will then be “below” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (for example, rotated by 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly.

The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof.

Thicknesses, sizes, and shapes of lenses illustrated in the drawings may have been slightly exaggerated for convenience of explanation. In addition, the shapes of spherical surfaces or aspherical surfaces of the lenses described in the detailed description and illustrated in the drawings are merely examples. That is, the shapes of the spherical surfaces or the aspherical surfaces of the lenses are not limited to the examples described herein.

Numerical values of radii of curvature, thicknesses of lenses, distances between elements including lenses or surfaces, effective aperture radii of lenses, focal lengths, and diameters, thicknesses, and lengths of various elements are expressed in millimeters (mm), and angles are expressed in degrees. Thicknesses of lenses and distances between elements including lenses or surfaces are measured along the optical axis of the optical imaging system.

The term “effective aperture radius” as used in this application refers to a radius of a portion of a surface of a lens or other element (an object-side surface or an image-side surface of a lens or other element) through which light actually passes. The effective aperture radius is equal to a distance measured perpendicular to an optical axis of the surface between the optical axis of the surface and the outermost point on the surface through which light actually passes. Therefore, the effective aperture radius may be equal to a radius of an optical portion of a surface, or may be smaller than the radius of the optical portion of the surface if light does not pass through a peripheral portion of the optical portion of the surface. The object-side surface and the image-side surface of a lens or other element may have different effective aperture radii.

In this application, unless stated otherwise, a reference to the shape of a lens surface means the shape of a paraxial region of the lens surface. A paraxial region of a lens surface is a central portion of the lens surface surrounding the optical axis of the lens surface in which light rays incident to the lens surface make a small angle θ to the optical axis and the approximations sin θ ≈ θ, tan θ ≈ θ, and cos θ ≈ 1 are valid.

For example, a statement that the object-side surface of a lens is convex means that at least a paraxial region of the object-side surface of the lens is convex, and a statement that the image-side surface of the lens is concave means that at least a paraxial region of the image-side surface of the lens is concave. Therefore, even though the object side-surface of the lens may be described as being convex, the entire object-side surface of the lens may not be convex, and a peripheral region of the object-side surface of the lens may be concave. Also, even though the image-side surface of the lens may be described as being concave, the entire image-side surface of the lens may not be concave, and a peripheral region of the image-side surface of the lens may be convex.

FIGS. 57 and 58 are cross-sectional views illustrating examples of an optical imaging system and a lens barrel coupled to each other.

Referring to FIGS. 57 and 58 , an optical imaging system 100 includes a plurality of lenses disposed along an optical axis. In addition, the optical imaging system 100 further includes a lens barrel 200 accommodating the plurality of lenses therein. The plurality of lenses are spaced apart from each other by predetermined distances along the optical axis.

Each lens of the optical imaging system 100 includes an optical portion and a rib. The optical portion of the lens is a portion of the lens that is configured to refract light, and is generally formed in a central portion of the lens. The rib of the lens is an edge portion of the lens that enables the lens to be mounted in the lens barrel 200 and the optical axis of the lens to be aligned with the optical axis of the optical imaging system 100. The rib of the lens extends radially outward from the optical portion, and may be formed integrally with the optical portion. The optical portions of the lenses are generally not in contact with each other. For example, the first to seventh lenses are mounted in the lens barrel 200 so that they are spaced apart from one another by predetermined distances along the optical axis of the optical imaging system 100. The ribs of the lenses may be in selective contact with each other. For example, the ribs of the first to fourth lenses, or the first to fifth lenses, or the second to fourth lenses, may be in contact with each other so that the optical axes of these lenses may be easily aligned with the optical axis of the optical imaging system 100.

The examples of the optical imaging system 100 described in this application may include a self-alignment structure as illustrated in FIGS. 57 and 58 .

In one example illustrated in FIG. 57 , the optical imaging system 100 includes a self-alignment structure in which optical axes of four consecutive lenses 1000, 2000, 3000, and 4000 are aligned with an optical axis of the optical imaging system 100 by coupling the four lenses 1000, 2000, 3000, and 4000 to one another.

The first lens 1000 disposed closest to an object side of the optical imaging system 100 is disposed in contact with an inner surface of the lens barrel 200 to align the optical axis of the first lens 1000 with the optical axis of the optical imaging system 100, the second lens 2000 is coupled to the first lens 1000 to align the optical axis of the second lens 2000 with the optical axis of the optical imaging system 100, the third lens 3000 is coupled to the second lens 2000 to align the optical axis of the third lens 3000 with the optical axis of the optical imaging system 100, and the fourth lens 4000 is coupled to the third lens 3000 to align the optical axis of the fourth lens 4000 with the optical axis of the optical imaging system 100. The second lens 2000 to the fourth lens 4000 may not be disposed in contact with the inner surface of the lens barrel 200.

Although FIG. 57 illustrates that the first lens 1000 to the fourth lens 4000 are coupled to one another, the four consecutive lenses that are coupled to one another may be changed to the second lens 2000 to a fifth lens 5000, the third lens 3000 to a sixth lens 6000, or the fourth lens 4000 to a seventh lens 7000.

In another example illustrated in FIG. 58 , the optical imaging system 100 includes a self-alignment structure in which optical axes of five consecutive lenses 1000, 2000, 3000, 4000, and 5000 are aligned with an optical axis of the optical imaging system 100 by coupling the five lenses 1000, 2000, 3000, 4000, and 5000 to one another.

The first lens 1000 disposed closest to an object side of the optical imaging system 100 is disposed in contact with an inner surface of the lens barrel 200 to align an optical axis of the first lens 1000 with the optical axis of the optical imaging system 100, the second lens 2000 is coupled to the first lens 1000 to align the optical axis of the second lens 2000 with the optical axis of the optical imaging system 100, the third lens 3000 is coupled to the second lens 2000 to align the optical axis of the third lens 3000 with the optical axis of the optical imaging system 100, the fourth lens 4000 is coupled to the third lens 3000 to align the optical axis of the fourth lens 4000 with the optical axis of the optical imaging system 100, and the fifth lens 5000 is coupled to the fourth lens 4000 to align the optical axis of the fifth lens 5000 with the optical axis of the optical imaging system 100. The second lens 2000 to the fifth lens 5000 may not be disposed in contact with the inner surface of the lens barrel 200.

Although FIG. 58 illustrates that the first lens 1000 to the fifth lens 5000 are coupled to one another, the five consecutive lenses that are coupled to one another may be changed to the second lens 2000 to a sixth lens 6000, or the third lens 3000 to a seventh lens 7000.

The first lens 1000 is a lens closest to an object (or a subject) to be imaged by the optical imaging system 100, while the seventh lens 7000 is a lens closest to an image sensor (not shown in FIGS. 57 and 58 , but see the image sensor 190 in FIG. 1 , for example).

In addition, an object-side surface of a lens is a surface of the lens facing the object, and an image-side surface of a lens is a surface of the lens facing the image sensor.

The examples of the optical imaging system 100 disclosed in this application include seven lenses.

For example, referring to FIGS. 57 and 58 , the optical imaging system 100 includes a first lens 1000, a second lens 2000, a third lens 3000, a fourth lens 4000, a fifth lens 5000, a sixth lens 6000, and a seventh lens 7000 sequentially disposed in numerical order along an optical axis of the optical imaging system 100 from an object side of the optical imaging system 100 toward an imaging plane of the optical imaging system 100.

The optical imaging system 100 further includes an image sensor and a filter. The image sensor forms an imaging plane, and converts light refracted by the first to seventh lenses into an electric signal. The filter is disposed between the seventh lens and the imaging plane, and blocks infrared rays in the light refracted by the first to seventh lenses from being incident on the imaging plane.

In addition, the optical imaging system 100 further includes a stop to adjust an amount of light incident on the imaging plane. For example, the stop may be disposed in front of the first lens 1000, or between the first lens 1000 and the second lens 2000, or between the second lens 2000 and the third lens 3000, or at the position of either an object-side surface or an image-side surface of one of the first lens 1000 to the third lens 3000. The stop may be disposed relatively close to the first lens 1000 to reduce a total length (TTL) of the optical imaging system 100. Some examples may include two stops, one of which may be disposed in front of the first lens 1000, or at the position of the object-side surface of the first lens 1000, or between the object-side surface and the image-side surface of the first lens 1000.

In the examples illustrated in FIGS. 57 and 58 , a spacer is disposed between each pair of adjacent lenses. At least a portion of the rib of each lens is in contact with one or two of the spacers. The spacers maintain spacings between the lenses, and block stray light from reaching the imaging plane.

The spacers include a first spacer SP1, a second spacer SP2, a third spacer SP3, a fourth spacer SP4, a fifth spacer SP5, and a sixth spacer SP6 disposed from the object side of the optical imaging system 100 toward the image sensor. In some examples, the spacers further include a seventh spacer SP7.

The first spacer SP1 is disposed between the first lens 1000 and the second lens 2000, the second spacer SP2 is disposed between the second lens 2000 and the third lens 3000, the third spacer SP3 is disposed between the third lens 3000 and the fourth lens 4000, the fourth spacer SP4 is disposed between the fourth lens 4000 and the fifth lens 5000, the fifth spacer SP5 is disposed between the fifth lens 5000 and the sixth lens 6000, and the sixth spacer SP6 is disposed between the sixth lens 6000 and the seventh lens 7000. When the seventh spacer SP7 is included, the seventh spacer SP7 is disposed between the sixth lens 6000 and the sixth spacer SP6. A thickness of the seventh spacer SP7 in an optical axis direction may be greater than a thickness of the sixth spacer SP6 in the optical axis direction.

The first lens has a positive refractive power or a negative refractive power. In addition, the first lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the first lens may be convex, and an image-side surface thereof may be concave.

At least one of the object-side surface and the image-side surface of the first lens may be aspherical. For example, both surfaces of the first lens may be aspherical.

The second lens has a positive refractive power or a negative refractive power. In addition, the second lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the second lens may be convex, and an image-side surface thereof may be concave.

Alternatively, both surfaces of the second lens may be convex. In detail, the object-side surface and the image-side surface of the second lens may be convex.

At least one of the object-side surface and the image-side surface of the second lens may be aspherical. For example, both surfaces of the second lens may be aspherical.

The third lens has a positive refractive power or a negative refractive power. In addition, the third lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the third lens may be convex, and an image-side surface thereof may be concave.

Alternatively, both surfaces of the third lens may be convex. In detail, the object-side surface and the image-side surface of the third lens may be convex.

Alternatively, the third lens may have a meniscus shape of which an image-side surface is convex. In detail, an object-side surface of the third lens may be concave, and an image-side surface thereof may be convex.

At least one of the object-side surface and the image-side surface of the third lens may be aspherical. For example, both surfaces of the third lens may be aspherical.

The fourth lens has a positive refractive power or a negative refractive power. In addition, the fourth lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the fourth lens may be convex, and an image-side surface thereof may be concave.

Alternatively, both surfaces of the fourth lens may be convex. In detail, the object-side surface and the image-side surface of the fourth lens may be convex.

Alternatively, the fourth lens may have a meniscus shape of which an image-side surface is convex. In detail, an object-side surface of the fourth lens may be concave, and an image-side surface thereof may be convex.

At least one of the object-side surface and the image-side surface of the fourth lens may be aspherical. For example, both surfaces of the fourth lens may be aspherical.

The fifth lens has a positive refractive power or a negative refractive power. In addition, the fifth lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the fifth lens may be convex, and an image-side surface thereof may be concave.

Alternatively, the fifth lens may have a meniscus shape of which an image-side surface is convex. In detail, an object-side surface of the fifth lens may be concave, and an image-side surface thereof may be convex.

At least one of the object-side surface and the image-side surface of the fifth lens may be aspherical. For example, both surfaces of the fifth lens may be aspherical.

The sixth lens has a positive refractive power or a negative refractive power. In addition, the sixth lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the sixth lens may be convex, and an image-side surface thereof may be concave.

Alternatively, both surfaces of the sixth lens may be convex. In detail, the object-side surface and the image-side surface of the sixth lens may be convex.

Alternatively, the sixth lens may have a meniscus shape of which an image-side surface is convex. In detail, an object-side surface of the sixth lens may be concave, and an image-side surface thereof may be convex.

Alternatively, both surfaces of the sixth lens may be concave. In detail, the object-side surface and the image-side surface of the sixth lens may be concave.

At least one of the object-side surface and the image-side surface of the sixth lens may be aspherical. For example, both surfaces of the sixth lens may be aspherical.

The seventh lens has a positive refractive power or a negative refractive power. In addition, the seventh lens may have a meniscus shape of which an object-side surface is convex. In detail, an object-side surface of the seventh lens may be convex, and an image-side surface thereof may be concave.

Alternatively, both surfaces of the seventh lens may be concave. In detail, the object-side surface and the image-side surface of the seventh lens may be concave.

At least one of the object-side surface and the image-side surface of the seventh lens may be aspherical. For example, both surfaces of the seventh lens may be aspherical.

In addition, at least one inflection point may be formed on at least one of the object-side surface and the image-side surface of the seventh lens. An inflection point is a point where a lens surface changes from convex to concave, or from concave to convex. A number of inflection points is counted from a center of the lens to an outer edge of the optical portion of the lens. For example, the object-side surface of the seventh lens may be convex in a paraxial region, and become concave toward an edge thereof. The image-side surface of the seventh lens may be concave in a paraxial region, and become convex toward an edge thereof.

FIG. 59 is a cross-sectional view illustrating an example of a shape of a rib of a seventh lens.

Light reflected from the object (or the subject) may be refracted by the first to seventh lenses. In this case, an unintended reflection of the light may occur. The unintended reflection of the light, which is light unrelated to formation of an image, may cause a flare phenomenon in a captured image.

The examples of the optical imaging system 100 described in this application may include a structure for preventing a flare phenomenon and reflection.

For example, as illustrated in FIG. 59 , a rib of the seventh lens 7000 disposed closest to the image sensor includes a surface-treated area EA. The surface-treated area EA is a portion of a surface of the rib that has been surface-treated to be rougher than other portions of the surface of the rib. For example, the surface-treated area EA may be formed by chemical etching, physical grinding, or any other surface treatment method capable of increasing a roughness of a surface. The surface-treated area EA scatters reflected light.

Therefore, even though the unintended reflection of the light may occur, the reflected light is prevented from being concentrated at one point, and therefore the occurrence of the flare phenomenon may be suppressed.

The surface-treated area EA may be formed in an entire area from an edge of the optical portion of the seventh lens 7000 through which light actually passes to an outer end of the rib. However, as illustrated in FIG. 59 , non-treated areas NEA including step portions E11, E21, and E22 may not be surface-treated, or may be surface-treated to have a roughness less than a roughness of the surface-treated area EA. The step portions E11, E21, and E22 are portions where the thickness of the rib abruptly changes. A first non-treated area NEA formed on an object-side surface of the seventh lens 7000 and including a first step portion E11 and a second non-treated area NEA formed on an image-side surface of the seventh lens 7000 and including a second step portion E12 and a third step portion E22 may overlap each other when viewed in the optical axis direction.

A width G1 of the first non-treated area NEA formed on the object-side surface of the seventh lens 7000 may be different from a width G2 of the second non-treated area NEA formed on the image-side surface of the seventh lens 7000. In the example illustrated in FIG. 59 , G1 is greater than G2.

The width G1 of the first non-treated area NEA includes the first step portion E11, the second step portion E21, and the third step portion E22 when viewed in the optical axis direction, and the width G2 of the second non-treated area includes the second step portion E21 and the third step portion E22 but not the first step portion E11 when viewed in the optical axis direction. A distance G4 from the outer end of the rib to the second step portion E21 is smaller than a distance G3 from the outer end of the rib to the first step portion E11. Similarly, a distance G5 from the outer end of the rib to the third step portion E22 is smaller than the distance G3 from the outer end of the rib to the first step portion E11.

The positions at which the non-treated areas NEA and the step portions E11, E21, and E22 are formed as described above and shown in FIG. 59 may be advantageous for measuring a concentricity of the seventh lens 7000.

The lenses of the optical imaging system may be made of a light material having a high light transmittance. For example, the first to seventh lenses may be made of a plastic material. However, a material of the first to seventh lenses is not limited to the plastic material.

In addition, the first to seventh lenses may have at least one aspherical surface. That is, at least one of the object-side surface and the image-side surface of all of the first to seventh lenses may be aspherical. The aspherical surfaces of the first to seventh lenses may be represented by the following Equation 1:

$\begin{array}{l} {Z = \frac{cY^{2}}{1 + \sqrt{1 - \left( {1 + K} \right)c^{2}Y^{2}}} + AY^{4} + BY^{6} + CY^{8} + DY^{10} + EY^{12} +} \\ {FY^{14} + GY^{16} + HY^{18} + \ldots} \end{array}$

In Equation 1, c is a curvature of a lens surface and is equal to an inverse of a radius of curvature of the lens surface at an optical axis of the lens surface, K is a conic constant, Y is a distance from a certain point on an aspherical surface of the lens to an optical axis of the lens in a direction perpendicular to the optical axis, A to H are aspherical constants, Z (or sag) is a distance between the certain point on the aspherical surface of the lens at the distance Y to the optical axis and a tangential plane perpendicular to the optical axis meeting the apex of the aspherical surface of the lens. Some of the examples disclosed in this application include an aspherical constant J. An additional term of JY²⁰ may be added to the right side of Equation 1 to reflect the effect of the aspherical constant J.

The optical imaging system may satisfy one or more of the following Conditional Expressions 1 to 5:

0.1 < L1w/L7w < 0.4

0.5 < S6d/f < 1.4

0.4 < L1TR/L7TR < 1.9

0.5 < L1234TRavg/L7TR < 0.9

0.5 < L12345TRavg/L7TR < 0.9

In the above Conditional Expressions, L1w is a weight of the first lens, and L7w is a weight of the seventh lens.

S6d is an inner diameter of the sixth spacer, and f is an overall focal length of the optical imaging system.

L1TR is an overall outer diameter of the first lens, and L7TR is an overall outer diameter of the seventh lens. The overall outer diameter of a lens is an outer diameter of the lens including both the optical portion of the lens and the rib of the lens.

L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, and L12345TRavg is an average value of overall outer diameters of the first to fifth lenses.

Conditional Expression 1 is a conditional expression related to a weight ratio between the first lens and the seventh lens, and when Conditional Expression 1 is satisfied, optical axes may be easily aligned with one another through contact between the respective lenses and contact between the lenses and the lens barrel.

Conditional Expression 2 is a conditional expression related to a ratio between the inner diameter of the sixth spacer disposed between the sixth lens and the seventh lens and the overall focal length of the optical imaging system, and when Conditional Expression 2 is satisfied, the flare phenomenon due to the unintended reflection of the light may be suppressed.

Conditional Expression 3 is a conditional expression related to a ratio between the overall outer diameter of the first lens and the overall outer diameter of the seventh lens, and when Conditional Expression 3 is satisfied, optical axes may be easily aligned with one another through contact between the respective lenses and contact between the lenses and the lens barrel.

Conditional Expression 4 is a conditional expression related to a ratio between the average value of the overall outer diameters of the first to fourth lenses and the overall outer diameter of the seventh lens, and when Conditional Expression 4 is satisfied, aberration may be easily corrected to improve resolution.

Conditional Expression 5 is a conditional expression related to a ratio between the average value of the overall outer diameters of the first to fifth lenses and the overall outer diameter of the seventh lens, and when Conditional Expression 5 is satisfied, aberration may be easily corrected to improve resolution.

The optical imaging system may also satisfy one or more of the following Conditional Expressions 6 to 10:

0.1 < L1w/L7w < 0.3

0.5 < S6d/f < 1.2

0.4 < L1TR/L7TR < 0.7

0.5 < L1234TRavg/L7TR < 0.75

0.5 < L12345TRavg/L7TR < 0.76

Conditional Expressions 6 to 10 are the same as Conditional Expressions 1 to 5, except that Conditional Expressions 6 to 10 specify narrower ranges.

The optical imaging system may also satisfy one or more of the following Conditional Expressions 11 to 32:

0.01 < R1/R4 < 1.3

0.1 < R1/R5 < 0.7

0.05 < R1/R6 < 0.9

0.2 < R1/R11 < 1.2

0.8 < R1/R14 < 1.2

0.6 < (R11 + R14)/(2 * R1) < 3.0

0.4 < D13/D57 < 1.2

0.1 < (1/f1 + 1/f2 + 1/f3 + 1/f4 + 1/f5 + 1/f6 + 1/f7) * f < 0.8

0.1 < (1/f1 + 1/f2 + 1/f3 + 1/f4 + 1/f5 + 1/f6 + 1/f7) * TTL < 1.0

0.2 < TD1/D67 < 0.8

0.1 < (R11 + R14)/(R5 + R6) < 1.0

SD12 < SD34

SD56 < SD67

SD56 < SD34

0.6 < TTL/(2 * IMG HT) < 0.9

0.2 < ΣSD/ΣTD < 0.7

0 < min (f1:f3)/max (f4:f7) < 0.4

0.4 < ΣTD/TTL < 0.7

0.7 < SL/TTL < 1.0

0.81 < f12/f123 < 0.96

0.6 < f12/f1234 < 0.84

TTL ≤ 6.00

In the above Conditional Expressions, R1 is a radius of curvature of an object-side surface of the first lens, R4 is a radius of curvature of an image-side surface of the second lens, R5 is a radius of curvature of an object-side surface of the third lens, R6 is a radius of curvature of an image-side surface of the third lens, R11 is a radius of curvature of an object-side surface of the sixth lens, R14 is a radius of curvature of an image-side surface of the seventh lens.

D13 is a distance along an optical axis of the optical imaging system from the object-side surface of the first lens to the image-side surface of the third lens, and D57 is a distance along the optical axis from an object-side surface of the fifth lens to the image-side surface of the seventh lens.

f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f is an overall focal length of the optical imaging system, and TTL is a distance along the optical axis from the object-side surface of the first lens to an imaging plane of an image sensor of the optical imaging system.

TD1 is a thickness along the optical axis of the first lens, and D67 is a distance along the optical axis from the object-side surface of the sixth lens to the image-side surface of the seventh lens.

SD12 is a distance along the optical axis from an image-side surface of the first lens to an object-side surface of the second lens, SD34 is a distance along the optical axis from the image-side surface of the third lens to an object-side surface of the fourth lens, SD56 is a distance along the optical axis from an image-side surface of the fifth lens to the object-side surface of the sixth lens, and SD67 is a distance along the optical axis from an image-side surface of the sixth lens to an object-side surface of the seventh lens.

IMG HT is one-half of a diagonal length of the imaging plane of the image sensor.

ΣSD is a sum of air gaps along the optical axis between the first to seventh lenses, and ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses. An air gap is a distance along the optical axis between adjacent ones of the first to seventh lenses.

min(f1:f3) is a minimum value of absolute values of the focal lengths of the first to third lenses, and max(f4:f7) is a maximum value of absolute values of the focal lengths of the fourth to seventh lenses.

SL is a distance along the optical axis from the stop to the imaging plane of the image sensor.

f12 is a composite focal length of the first and second lenses, f123 is a composite focal length of the first to third lenses, and f1234 is a composite focal length of the first to fourth lenses.

When Conditional Expression 11 is satisfied, correction effects of longitudinal spherical aberration and astigmatic field curves may be improved, and resolution may thus be improved.

When Conditional Expression 12 is satisfied, correction effects of longitudinal spherical aberration and astigmatic field curves may be improved, and resolution may thus be improved.

When Conditional Expression 13 is satisfied, correction effects of longitudinal spherical aberration and astigmatic field curves may be improved, and resolution may thus be improved.

When Conditional Expression 14 is satisfied, a correction effect of longitudinal spherical aberration may be improved, and the flare phenomenon may be prevented. Therefore, resolution may be improved.

When Conditional Expression 15 is satisfied, a correction effect of longitudinal spherical aberration may be improved, and an imaging plane curvature phenomenon may be suppressed. Therefore, resolution may be improved.

When Conditional Expression 16 is satisfied, a correction effect of longitudinal spherical aberration may be improved, an imaging plane curvature phenomenon may be suppressed, and the flare phenomenon may be prevented. Therefore, resolution may be improved.

When Conditional Expression 17 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 18 is satisfied, sensitivity of each lens may be improved to improve mass productivity.

When Conditional Expression 20 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 22 is satisfied, a chromatic aberration correction effect may be improved.

When Conditional Expression 25 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 26 is satisfied, mass productivity of each lens may be improved, and a slim optical imaging system may be implemented.

When Conditional Expression 27 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 28 is satisfied, mass productivity of each lens may be improved, and a slim optical imaging system may be implemented.

When Conditional Expression 29 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 30 is satisfied, a slim optical imaging system may be implemented.

When Conditional Expression 31 is satisfied, a slim optical imaging system may be implemented.

Next, various examples of the optical imaging system will be described. In the tables that appear in the following examples, S1 denotes an object-side surface of a first lens, S2 denotes an image-side surface of the first lens, S3 denotes an object-side surface of a second lens, S4 denotes an image-side surface of the second lens, S5 denotes an object-side surface of a third lens, S6 denotes an image-side surface of the third lens, S7 denotes an object-side surface of a fourth lens, S8 denotes an image-side surface of the fourth lens, S9 denotes an object-side surface of a fifth lens, S10 denotes an image-side surface of the fifth lens, S11 denotes an object-side surface of a sixth lens, S12 denotes an image-side surface of the sixth lens, S13 denotes an object-side surface of a seventh lens, S14 denotes an image-side surface of the seventh lens, S15 denotes an object-side surface of a filter, S16 denotes an image-side surface of the filter, and S17 denotes an imaging plane.

First Example

FIG. 1 is a view illustrating a first example of an optical imaging system, and FIG. 2 illustrates aberration curves of the optical imaging system of FIG. 1 .

The first example of the optical imaging system includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, a filter 180, an image sensor 190, and a stop (not shown) disposed between the first lens 110 and the second lens 120.

The first lens 110 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 120 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 130 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fourth lens 140 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 150 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 160 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 170 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 170. In particular, the object-side surface of the seventh lens 170 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 170. In particular, the image-side surface of the seventh lens 170 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 1 , the stop is disposed at a distance of 0.929 mm from the object-side surface of the first lens 110 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 1 listed in Table 57 that appears later in this application.

Table 1 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 1 , and Table 2 below shows aspherical surface coefficients of the lenses of FIG. 1 . Both surfaces of all of the lenses of FIG. 1 are aspherical except for the object-side surface of the second lens 120, which is spherical.

TABLE 1 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.0856092 0.9292118 1.546 56.114 1.59 S2 8.93043513 0.1200399 1.53 S3 Second Lens 5.86244103 0.23 1.669 20.353 1.43 S4 3.38051351 0.3866461 1.26 S5 Third Lens 18.3857198 0.5076267 1.546 56.114 1.35 S6 -65.41545 0.1166172 1.43 S7 Fourth Lens 7.98746366 0.26 1.669 20.353 1.45 S8 6.4766936 0.2853054 1.61 S9 Fifth Lens 58.6668676 0.3539979 1.644 23.516 1.74 S10 7.23744347 0.2316773 2.00 S11 Sixth Lens 3.60524352 0.7682194 1.546 56.114 2.24 S12 -2.4011013 0.5228213 2.49 S13 Seventh Lens -2.5241007 0.38 1.546 56.114 3.26 S14 3.01958733 0.107837 3.38 S15 Filter Infinity 0.11 1.519 64.197 3.66 S16 Infinity 0.69 3.69 S17 Imaging Plane Infinity 4.00

TABLE 2 K A B C D E F G H J S1 -1.08941 0.013187 0.009962 -0.01583 0.018971 -0.01385 0.006018 -0.00143 0.000134 0 S2 12.57642 -0.04786 0.041598 -0.02674 0.011876 -0.00481 0.001502 -0.00027 1.69E-05 0 S3 0 0 0 0 0 0 0 0 0 0 S4 -1.83147 -0.06555 0.065057 -0.0107 -0.02653 0.029888 -0.01246 0.001484 0.000416 0 S5 0 -0.02189 -0.00092 -0.021 0.023433 -0.0118 -0.00341 0.005424 -0.00134 0 S6 -95 -0.0632 -0.00174 0.021978 -0.05295 0.060706 -0.04155 0.015887 -0.00255 0 S7 0 -0.1339 0.057694 -0.15773 0.257112 -0.23831 0.127642 -0.03688 0.004447 0 S8 0 -0.1017 0.077852 -0.15614 0.199503 -0.15311 0.069086 -0.01708 0.001797 0 S9 0 -0.12052 0.152814 -0.15655 0.114747 -0.05967 0.019523 -0.00362 0.000296 0 S10 3.458235 -0.18471 0.140789 -0.10891 0.070568 -0.03223 0.008954 -0.00133 8.01E-05 0 S11 -19.5338 -0.01378 -0.01807 0.002094 0.001582 -0.0008 0.00013 -2.5E-06 -6.7E-07 0 S12 -0.75818 0.09278 -0.06699 0.021292 -0.0052 0.001388 -0.00027 2.7E-05 -1.1E-06 0 S13 -14.2476 -0.09472 -0.00377 0.015632 -0.00476 0.000702 -5.8E-05 2.53E-06 -4.7E-08 0 S14 -0.57988 -0.09619 0.026231 -0.00426 0.000309 8.85E-06 -3.9E-06 3.28E-07 -1.2E-08 1.61E-10

Second Example

FIG. 3 is a view illustrating a second example of an optical imaging system, and FIG. 4 illustrates aberration curves of the optical imaging system of FIG. 3 .

The second example of the optical imaging system includes a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, a filter 280, an image sensor 290, and a stop (not shown) disposed between the first lens 210 and the second lens 220.

The first lens 210 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 220 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 230 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fourth lens 240 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 250 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 260 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 270 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 270. In particular, the object-side surface of the seventh lens 270 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 270. In particular, the image-side surface of the seventh lens 270 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 3 , the stop is disposed at a distance of 0.954 mm from the object-side surface of the first lens 210 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 2 listed in Table 57 that appears later in this application.

Table 3 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 3 , and Table 4 below shows aspherical surface coefficients of the lenses of FIG. 3 . Both surfaces of all of the lenses of FIG. 3 are aspherical except for the object-side surface of the second lens 220, which is spherical.

TABLE 3 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.09523177 0.9535556 1.546 56.114 1.63 S2 8.9751949 0.1222166 1.56 S3 Second Lens 5.87072709 0.23 1.669 20.353 1.45 S4 3.37511591 0.3824262 1.28 S5 Third Lens 16.2065401 0.4972101 1.546 56.114 1.35 S6 -139.89462 0.1167997 1.43 S7 Fourth Lens 7.40791882 0.26 1.669 20.353 1.44 S8 6.08803731 0.2808933 1.61 S9 Fifth Lens 38.3058612 0.3659631 1.644 23.516 1.74 S10 6.70285435 0.2283896 2.00 S11 Sixth Lens 3.49003116 0.7733843 1.546 56.114 2.23 S12 -2.3502414 0.5034976 2.49 S13 Seventh Lens -2.464576 0.38 1.546 56.114 3.26 S14 3.03579165 0.1056639 3.37 S15 Filter Infinity 0.11 1.519 64.197 3.67 S16 Infinity 0.69 3.70 S17 Imaging Plane Infinity 4.00

TABLE 4 K A B C D E F G H J S1 -1.10381 0.012898 0.009879 -0.01571 0.018687 -0.01362 0.005924 -0.00141 0.000134 0 S2 13.09551 -0.04765 0.043287 -0.03135 0.017346 -0.00841 0.002867 -0.00055 4.24E-05 0 S3 0 0 0 0 0 0 0 0 0 0 S4 -1.83331 -0.06675 0.070325 -0.02257 -0.00885 0.012981 -0.00247 -0.00187 0.000889 0 S5 0 -0.02215 0.000148 -0.02237 0.025134 -0.01334 -0.00223 0.00481 -0.00122 0 S6 -95 -0.06308 -0.00187 0.021015 -0.04859 0.053351 -0.03506 0.013045 -0.00206 0 S7 0 -0.13364 0.059514 -0.16508 0.269468 -0.25157 0.136766 -0.0403 0.00497 0 S8 0 -0.10179 0.07915 -0.15722 0.198605 -0.15112 0.067755 -0.01665 0.00174 0 S9 0 -0.11882 0.149294 -0.14949 0.107127 -0.05474 0.017607 -0.00319 0.000255 0 S10 2.859774 -0.18537 0.141763 -0.11055 0.071846 -0.03276 0.009077 -0.00134 8.07E-05 0 S11 -19.5338 -0.01212 -0.01555 -0.00129 0.003885 -0.00177 0.000369 -3.4E-05 9.95E-07 0 S12 -0.81308 0.09292 -0.06559 0.020026 -0.00471 0.001294 -0.00026 2.67E-05 -1.1E-06 0 S13 -13.479 -0.09591 -0.0047 0.016588 -0.00506 0.00075 -6.2E-05 2.73E-06 -5E-08 0 S14 -0.59135 -0.09685 0.02646 -0.00421 0.000279 1.49E-05 -4.5E-06 3.64E-07 -1.3E-08 1.67E-10

Third Example

FIG. 5 is a view illustrating a third example of an optical imaging system, and FIG. 6 illustrates aberration curves of the optical imaging system of FIG. 5 .

The third example of the optical imaging system includes a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, a filter 380, an image sensor 390, and a stop (not shown) disposed between the second lens 320 and the third lens 330.

The first lens 310 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 320 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 330 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 340 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fifth lens 350 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 360 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 370 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 370. In particular, the object-side surface of the seventh lens 370 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 370. In particular, the image-side surface of the seventh lens 370 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 5 , the stop is disposed at a distance of 0.977 mm from the object-side surface of the first lens 310 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 3 listed in Table 57 that appears later in this application.

Table 5 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 5 , and Table 6 below shows aspherical surface coefficients of the lenses of FIG. 5 . Both surfaces of all of the lenses of FIG. 5 are aspherical.

TABLE 5 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.82391792 0.7125976 1.546 56.114 1.29 S2 7.84659281 0.0641189 1.24 S3 Second Lens 7.25645695 0.2 1.669 20.353 1.19 S4 3.22746768 0.1833442 1.11 S5 Third Lens 3.55978049 0.289782 1.546 56.114 1.07 S6 5.37540447 0.3323457 1.09 S7 Fourth Lens 108.917864 0.3185673 1.546 56.114 1.14 S8 -25.473189 0.3581803 1.31 S9 Fifth Lens -10.246565 0.32 1.658 21.494 1.52 S10 -2511.6237 0.1796019 1.82 S11 Sixth Lens 2.24163583 0.5032143 1.658 21.494 2.09 S12 2.29949488 0.405792 2.46 S13 Seventh Lens 2.25160113 0.563893 1.537 55.711 3.10 S14 1.62924582 0.1385632 3.13 S15 Filter Infinity 0.11 1.519 64.197 3.58 S16 Infinity 0.7200239 3.61 S17 Imaging Plane Infinity 4.00

TABLE 6 K A B C D E F G H S1 -0.05681 -0.00382 0.005709 -0.01903 0.017159 -0.00924 0.001372 -9.6E-05 0 S2 -25.6173 -0.01646 -0.07616 0.132063 -0.11427 0.054558 -0.01426 0.001526 0 S3 -23.4928 -0.03092 -0.07642 0.205444 -0.20566 0.115946 -0.03485 0.004323 0 S4 -2.4185 -0.029 -0.02587 0.11758 -0.1178 0.048002 0.01085 -0.00984 0 S5 1.638831 -0.0558 0.001053 -0.0238 0.077823 -0.07273 0.054265 -0.01613 0 S6 -1.64854 -0.03653 -0.00816 0.035786 -0.0842 0.148028 -0.10368 0.031151 0 S7 99 -0.07525 0.043317 -0.2362 0.448729 -0.47604 0.273589 -0.06373 0 S8 87.32309 -0.04708 0.003053 -0.09209 0.13981 -0.10712 0.045592 -0.00772 0 S9 3.284997 0.045871 -0.12833 0.159561 -0.16448 0.094896 -0.0278 0.003303 0 S10 -99 -0.03644 -0.03317 0.063386 -0.06646 0.033384 -0.00763 0.000644 0 S11 -16.0412 0.004354 -0.06522 0.059141 -0.0406 0.014529 -0.00241 0.000149 0 S12 -18.2699 -0.02906 0.016429 -0.01576 0.005873 -0.00116 0.000124 -5.6E-06 0 S13 -0.89844 -0.33707 0.157271 -0.04452 0.007967 -0.00085 4.89E-05 -1.1E-06 -5.4E-09 S14 -0.82188 -0.26788 0.125454 -0.04542 0.011249 -0.00179 0.000173 -9.2E-06 2.05E-07

Fourth Example

FIG. 7 is a view illustrating a fourth example of an optical imaging system, and FIG. 8 illustrates aberration curves of the optical imaging system of FIG. 7 .

The fourth example of the optical imaging system includes a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, a filter 480, an image sensor 490, and a stop (not shown) disposed between the second lens 420 and the third lens 430.

The first lens 410 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 420 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 430 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 440 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 450 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 460 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 470 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 470. In particular, the object-side surface of the seventh lens 470 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 470. In particular, the image-side surface of the seventh lens 470 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 7 , the stop is disposed at a distance of 1.062 mm from the object-side surface of the first lens 410 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 4 listed in Table 57 that appears later in this application.

Table 7 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 7 , and Table 8 below shows aspherical surface coefficients of the lenses of FIG. 7 . Both surfaces of all of the lenses of FIG. 7 are aspherical.

TABLE 7 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.02988734 0.8071808 1.546 56.114 1.50 S2 13.3648006 0.03 1.47 S3 Second Lens 4.79376157 0.225 1.669 20.353 1.41 S4 2.78744479 0.2223433 1.30 S5 Third Lens 4.82360261 0.2898759 1.546 56.114 1.24 S6 8.14950885 0.3234802 1.21 S7 Fourth Lens 7.95169453 0.2896338 1.546 56.114 1.24 S8 13.2949054 0.2359829 1.35 S9 Fifth Lens -5.3395632 0.3051644 1.658 21.494 1.41 S10 -10.758919 0.2260567 1.65 S11 Sixth Lens 4.03734585 0.85 1.658 21.494 1.75 S12 4.00738375 0.2243888 2.57 S13 Seventh Lens 3.39858655 0.7824535 1.537 55.711 3.30 S14 2.20528309 0.1384397 3.22 S15 Filter Infinity 0.11 1.519 64.197 3.59 S16 Infinity 0.6900019 3.62 S17 Imaging Plane Infinity 3.94

TABLE 8 K A B C D E F G H S1 0.055002 -0.00862 0.019719 -0.04878 0.061416 -0.04738 0.021289 -0.00524 0.000528 S2 -26.0973 -0.04292 0.055554 -0.07536 0.066566 -0.03618 0.01155 -0.00207 0.000165 S3 -36.1351 -0.04162 0.048893 -0.07864 0.079391 -0.04337 0.014109 -0.00297 0.000356 S4 -7.66553 -0.0165 0.01116 -0.03292 0.043974 -0.05263 0.056504 -0.0304 0.005911 S5 3.337325 -0.04652 0.049134 -0.1038 0.167627 -0.19024 0.165026 -0.07793 0.014471 S6 -0.02412 -0.05207 0.019764 0.012674 -0.00403 -0.04206 0.094388 -0.06504 0.015741 S7 -66.3047 -0.07065 -0.02908 0.041965 -0.11679 0.174957 -0.12258 0.040671 -0.00488 S8 19.54898 -0.06049 0.012663 -0.10426 0.186276 -0.22707 0.175833 -0.07314 0.012434 S9 -5.93087 -0.02712 -0.00151 0.063515 -0.12587 0.092909 -0.02991 0.003292 0 S10 33.02479 -0.09413 0.02661 0.047806 -0.07202 0.04396 -0.01237 0.001304 0 S11 -51.3785 0.001924 -0.10804 0.11432 -0.08252 0.035053 -0.00798 0.000753 0 S12 -31.504 -0.00904 -0.00561 0.001398 -0.00039 9.31E-05 -1.2E-05 5.9E-07 0 S13 -0.47616 -0.19617 0.090781 -0.02708 0.005169 -0.00061 4.35E-05 -1.7E-06 2.73E-08 S14 -0.78006 -0.14942 0.059181 -0.01981 0.004571 -0.00067 5.95E-05 -2.9E-06 5.85E-08

Fifth Example

FIG. 9 is a view illustrating a fifth example of an optical imaging system, and FIG. 10 illustrates aberration curves of the optical imaging system of FIG. 9 .

The fifth example of the optical imaging system includes a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, a filter 580, an image sensor 590, and a stop (not shown) disposed between the second lens 520 and the third lens 530.

The first lens 510 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 520 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The third lens 530 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 540 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The fifth lens 550 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 560 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 570 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 570. In particular, the object-side surface of the seventh lens 570 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 570. In particular, the image-side surface of the seventh lens 570 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 9 , the stop is disposed at a distance of 1.425 mm from the object-side surface of the first lens 510 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 5 listed in Table 57 that appears later in this application.

Table 9 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 9 , and Table 10 below shows aspherical surface coefficients of the lenses of FIG. 9 . Both surfaces of all of the lenses of FIG. 9 are aspherical.

TABLE 9 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.370605 0.543075 1.546 56.114 1.572 S2 3.837673 0.151623 1.517 S3 Second Lens 3.432869 0.707828 1.546 56.114 1.478 S4 -17.0251 0.022468 1.428 S5 Third Lens 5.142878 0.224676 1.679 19.236 1.300 S6 2.533326 0.588782 1.230 S7 Fourth Lens -1446.17 0.340433 1.679 19.236 1.404 S8 -1446.17 0.207036 1.600 S9 Fifth Lens 3.643447 0.326355 1.546 56.114 1.857 S10 3.822446 0.317149 2.199 S11 Sixth Lens 3.850899 0.440632 1.679 19.236 2.415 S12 3.049364 0.177387 2.808 S13 Seventh Lens 1.743028 0.613274 1.537 53.955 3.115 S14 1.56E+00 0.246638 3.314 S15 Filter Infinity 0.11 1.5187 64.1664 3.654985 S16 Infinity 0.8098264 3.687604 S17 Imaging Plane Infinity 4.07527

TABLE 10 K A B C D E F G H J S1 -7.5196 0.0476 -0.039 0.0108 -0.0002 -0.006 0.0045 -0.0012 0.0001 0 S2 -19.661 -0.0106 -0.0481 0.0183 0.0105 -0.0109 0.0039 -0.0006 3E-05 0 S3 0.042 -0.0249 -0.0196 0.0094 0.0041 0.0108 -0.014 0.0056 -0.0008 0 S4 0 0.0098 -0.0507 0.0341 0.0229 -0.0518 0.0341 -0.0103 0.0012 0 S5 -5.6502 -0.0476 0.0152 -0.0398 0.11 -0.1327 0.082 -0.0252 0.0031 0 S6 0.5327 -0.067 0.0583 -0.0705 0.0922 -0.0854 0.0499 -0.0161 0.0024 0 S7 0 -0.0158 -0.0083 -0.0305 0.0756 -0.0736 0.035 -0.0077 0.0005 0 S8 0 -0.0099 -0.0427 0.0077 0.0285 -0.0272 0.01 -0.0013 0 0 S9 -44.395 0.1048 -0.1251 0.08 -0.0437 0.0187 -0.0058 0.001 -7E-05 0 S10 -4.0715 -0.0175 0.0211 -0.0368 0.0252 -0.01 0.0024 -0.0003 2E-05 0 S11 -1.1211 0.0034 -0.0742 0.0637 -0.0381 0.0134 -0.0026 0.0003 -1E-05 0 S12 0.0464 -0.092 0.0339 -0.0168 0.0044 -0.0005 1E-05 3E-06 -2E-07 0 S13 -0.795 -0.2987 0.11 -0.0259 0.0046 -0.0007 7E-05 -5E-06 2E-07 -5E-09 S14 -1.3233 -0.199 0.0846 -0.0285 0.0073 -0.0013 0.0002 -1E-05 5E-07 -9E-09

Sixth Example

FIG. 11 is a view illustrating a sixth example of an optical imaging system, and FIG. 12 illustrates aberration curves of the optical imaging system of FIG. 11 .

The sixth example of the optical imaging system includes a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, a filter 680, an image sensor 690, and a stop (not shown) disposed between the second lens 620 and the third lens 630.

The first lens 610 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 620 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The third lens 630 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 640 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The fifth lens 650 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 660 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 670 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 670. In particular, the object-side surface of the seventh lens 670 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 670. In particular, the image-side surface of the seventh lens 670 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 11 , the stop is disposed at a distance of 1.169 mm from the object-side surface of the first lens 610 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 6 listed in Table 57 that appears later in this application.

Table 11 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 11 , and Table 12 below shows aspherical surface coefficients of the lenses of FIG. 11 . Both surfaces of all of the lenses of FIG. 11 are aspherical.

TABLE 11 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.951165 0.448752 1.546 56.114 1.307 S2 3.115162 0.125992 1.253 S3 Second Lens 2.868611 0.575289 1.546 56.114 1.214 S4 -12.9825 0.018563 1.180 S5 Third Lens 4.506414 0.185629 1.679 19.236 1.074 S6 2.196855 0.519693 1.016 S7 Fourth Lens -2108.87 0.279556 1.679 19.236 1.179 S8 -6755.44 0.171507 1.338 S9 Fifth Lens 3.113522 0.273438 1.546 56.114 1.528 S10 3.267187 0.241671 1.808 S11 Sixth Lens 3.22281 0.364954 1.679 19.236 1.996 S12 2.538835 0.143764 2.320 S13 Seventh Lens 1.445077 0.51219 1.537 53.955 2.500 S14 1.27E+00 0.250094 2.738 S15 Filter Infinity 0.11 1.5187 64.1664 2.939872 S16 Infinity 0.5978514 2.970893 S17 Imaging Plane Infinity 3.250775

TABLE 12 K A B C D E F G H J S1 -7.5279 0.0857 -0.105 0.0528 -0.0256 -0.0221 0.0379 -0.0166 0.0023 0 S2 -19.893 -0.0142 -0.1337 0.0682 0.0621 -0.0783 0.0306 -0.0031 -0.0006 0 S3 -0.0142 -0.0449 -0.0418 -0.0147 0.1136 0.012 -0.1333 0.0892 -0.0193 0 S4 0 0.0281 -0.189 0.276 -0.0808 -0.2297 0.2908 -0.1382 0.024 0 S5 -6.2325 -0.0763 -0.0054 -0.0795 0.6054 -1.1875 1.107 -0.5047 0.0912 0 S6 0.4782 -0.115 0.1396 -0.2676 0.5637 -0.7991 0.6898 -0.325 0.0682 0 S7 0 -0.0188 -0.0772 0.0717 0.0184 -0.081 0.0225 0.0277 -0.0139 0 S8 0 -0.0127 -0.1356 0.0837 0.0781 -0.1502 0.0847 -0.0163 0 0 S9 -49.08 0.1815 -0.3205 0.2837 -0.2161 0.1317 -0.0595 0.0158 -0.0017 0 S10 -5.4303 -0.0205 0.025 -0.1003 0.1046 -0.0624 0.0222 -0.0043 0.0003 0 S11 -1.136 0.0314 -0.2615 0.3261 -0.2695 0.133 -0.0369 0.0053 -0.0003 0 S12 0.0272 -0.1293 0.0241 5E-05 -0.0123 0.0085 -0.0024 0.0003 -2E-05 0 S13 -0.8 -0.5247 0.2994 -0.1227 0.0414 -0.0108 0.002 -0.0002 2E-05 -4E-07 S14 -1.3207 -0.3666 0.2425 -0.1248 0.0468 -0.0121 0.002 -0.0002 1E-05 -3E-07

Seventh Example

FIG. 13 is a view illustrating a seventh example of an optical imaging system, and FIG. 14 illustrates aberration curves of the optical imaging system of FIG. 13 .

The seventh example of the optical imaging system includes a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, a filter 780, an image sensor 790, and a stop (not shown) disposed between the first lens 710 and the second lens 720.

The first lens 710 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 720 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 730 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 740 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 750 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 760 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 770 has a negative refractive power, and a paraxial region of each of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 770. In particular, the object-side surface of the seventh lens 770 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 770. In particular, the image-side surface of the seventh lens 770 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 13 , the stop is disposed at a distance of 0.383 mm from the object-side surface of the first lens 710 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 7 listed in Table 57 that appears later in this application.

Table 13 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 13 , and Table 14 below shows aspherical surface coefficients of the lenses of FIG. 13 . Both surfaces of all of the lenses of FIG. 13 are aspherical.

TABLE 13 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.182354 0.332873 1.546 56.114 1.380 S2 1.943873 0.05 1.369 S3 Second Lens 1.685732 0.732159 1.546 56.114 1.335 S4 28.37273 0.05 1.264 S5 Third Lens 7.153573 0.22 1.679 19.236 1.185 S6 2.922347 0.426406 1.050 S7 Fourth Lens 46.9146 0.312126 1.646 23.528 1.112 S8 17.58601 0.26165 1.268 S9 Fifth Lens 2.265526 0.27 1.646 23.528 1.774 S10 2.314346 0.373051 1.839 S11 Sixth Lens 8.518581 0.607812 1.546 56.114 2.160 S12 -1.98711 0.378187 2.308 S13 Seventh Lens -4.7165 0.36 1.546 56.114 2.780 S14 1.89E+00 0.145735 2.998 S15 Filter Infinity 0.11 1.5187 64.1664 3.352752 S16 Infinity 0.67 3.384589 S17 Imaging Plane Infinity 3.712027

TABLE 14 K A B C D E F G H S1 -3.5715 0.0005 0.0011 -0.0181 0.0025 0.0107 -0.0084 0.0026 -0.0003 S2 -9.1496 -0.0513 -0.0055 0.0116 0.0161 -0.0207 0.0078 -0.001 0 S3 -2.5622 -0.0879 0.1115 -0.1204 0.1625 -0.1325 0.0578 -0.0118 0.0006 S4 -90 -0.078 0.2103 -0.4384 0.6397 -0.6153 0.3736 -0.1288 0.0189 S5 0 -0.1133 0.2975 -0.5447 0.7496 -0.7199 0.4525 -0.1642 0.0257 S6 4.6946 -0.0705 0.1434 -0.2144 0.1998 -0.0956 -0.0142 0.0399 -0.0137 S7 0 -0.0972 0.1221 -0.3303 0.5457 -0.6222 0.4555 -0.1995 0.0405 S8 0 -0.1596 0.2027 -0.3281 0.3412 -0.2472 0.1212 -0.0385 0.0064 S9 -18.27 -0.0564 -0.0069 0.0518 -0.0566 0.0228 -0.0011 -0.0019 0.0004 S10 -15.127 -0.0603 -0.0145 0.0594 -0.0601 0.0318 -0.0096 0.0015 -1E-04 S11 0 0.0027 -0.0398 0.025 -0.0137 0.005 -0.001 1E-04 -4E-06 S12 -1.1693 0.1224 -0.1006 0.0535 -0.0195 0.005 -0.0008 8E-05 -3E-06 S13 -4.4446 -0.097 -0.0137 0.0358 -0.0141 0.0028 -0.0003 2E-05 -5E-07 S14 -8.7431 -0.0906 0.0342 -0.009 0.0017 -0.0002 2E-05 -1E-06 3E-08

Eighth Example

FIG. 15 is a view illustrating an eighth example of an optical imaging system, and FIG. 16 illustrates aberration curves of the optical imaging system of FIG. 15 .

The eighth example of the optical imaging system includes a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, a filter 880, an image sensor 890, and a stop (not shown) disposed between the first lens 810 and the second lens 820.

The first lens 810 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 820 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 830 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 840 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 850 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 860 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 870 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 870. In particular, the object-side surface of the seventh lens 870 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 870. In particular, the image-side surface of the seventh lens 870 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 15 , the stop is disposed at a distance of 0.336 mm from the object-side surface of the first lens 810 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 8 listed in Table 57 that appears later in this application.

Table 15 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 15 , and Table 16 below shows aspherical surface coefficients of the lenses of FIG. 15 . Both surfaces of all of the lenses of FIG. 15 are aspherical.

TABLE 15 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.002076 0.290476 1.546 56.114 1.275 S2 1.735025 0.046207 1.265 S3 Second Lens 1.510849 0.69189 1.546 56.114 1.234 S4 25.17448 0.050782 1.156 S5 Third Lens 6.622812 0.20331 1.679 19.236 1.088 S6 2.690882 0.397038 0.970 S7 Fourth Lens 404.2399 0.304853 1.646 23.528 1.031 S8 26.39909 0.238795 1.192 S9 Fifth Lens 2.030671 0.231034 1.646 23.528 1.495 S10 2.049104 0.337714 1.721 S11 Sixth Lens 9.000096 0.577572 1.546 56.114 1.996 S12 -1.67925 0.339723 2.084 S13 Seventh Lens -3.83664 0.33269 1.546 56.114 2.569 S14 1.71E+00 0.146102 2.784 S15 Filter Infinity 0.11 1.5187 64.1664 3.104605 S16 Infinity 0.603297 3.133872 S17 Imaging Plane Infinity 3.409206

TABLE 16 K A B C D E F G H S1 -3.5658 -0.0001 0.0048 -0.0338 0.0058 0.0258 -0.024 0.0087 -0.0012 S2 -8.9286 -0.0617 -0.0072 0.019 0.0308 -0.0458 0.0196 -0.0029 0 S3 -2.4366 -0.118 0.178 -0.2127 0.3039 -0.2613 0.1138 -0.0182 -0.0012 S4 100 -0.0932 0.2737 -0.6752 1.2227 -1.4655 1.1 -0.4621 0.0813 S5 0 -0.1401 0.3995 -0.8103 1.2941 -1.4787 1.1095 -0.4775 0.0877 S6 4.6754 -0.0913 0.2084 -0.3503 0.3957 -0.2854 0.067 0.0558 -0.0336 S7 0 -0.1191 0.1586 -0.5241 1.0591 -1.4826 1.3333 -0.7155 0.1765 S8 0 -0.2012 0.3026 -0.6033 0.8015 -0.7547 0.4799 -0.1903 0.0367 S9 -18.968 -0.0705 -0.017 0.0854 -0.095 0.0372 0.0031 -0.007 0.0016 S10 -15.615 -0.0761 -0.0114 0.0715 -0.083 0.0509 -0.0182 0.0035 -0.0003 S11 0 -0.0083 -0.0355 0.0253 -0.0245 0.0145 -0.0045 0.0007 -5E-05 S12 -1.1609 0.1552 -0.1513 0.1068 -0.0571 0.0215 -0.005 0.0006 -3E-05 S13 -4.7786 -0.1272 -0.0055 0.0492 -0.0232 0.0053 -0.0007 4E-05 -1E-06 S14 -8.9618 -0.1184 0.0565 -0.0195 0.0048 -0.0009 1E-04 -6E-06 2E-07

Ninth Example

FIG. 17 is a view illustrating a ninth example of an optical imaging system, and FIG. 18 illustrates aberration curves of the optical imaging system of FIG. 17 .

The ninth example of the optical imaging system includes a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, a filter 980, an image sensor 990, and a stop (not shown) disposed between the first lens 910 and the second lens 920.

The first lens 910 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 920 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 930 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 940 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 950 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 960 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 970 has a negative refractive power, and a paraxial region of each of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 970. In particular, the object-side surface of the seventh lens 970 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 970. In particular, the image-side surface of the seventh lens 970 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 17 , the stop is disposed at a distance of 0.423 mm from the object-side surface of the first lens 910 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 9 listed in Table 57 that appears later in this application.

Table 17 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 17 , and Table 18 below shows aspherical surface coefficients of the lenses of FIG. 17 . Both surfaces of all of the lenses of FIG. 17 are aspherical.

TABLE 17 Surface No. Element Radius of Curvature Thickness/Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.368882 0.367771 1.546 56.114 1.537 S2 2.149833 0.055693 1.509 S3 Second Lens 1.901715 0.8054 1.546 56.114 1.470 S4 34.69271 0.055693 1.395 S5 Third Lens 8.116881 0.245048 1.679 19.236 1.315 S6 3.249705 0.44958 1.170 S7 Fourth Lens 27.77257 0.345117 1.646 23.528 1.242 S8 15.68604 0.292205 1.430 S9 Fifth Lens 2.481018 0.30074 1.646 23.528 1.793 S10 2.530918 0.421042 2.058 S11 Sixth Lens 8.852122 0.594719 1.546 56.114 2.406 S12 -2.33268 0.433709 2.591 S13 Seventh Lens -5.6504 0.400987 1.546 56.114 3.097 S14 2.11E+00 0.196308 3.252 S15 Filter Infinity 0.11 1.5187 64.1664 3.633461 S16 Infinity 0.713029 3.664237 S17 Imaging Plane Infinity 4.005175

TABLE 18 K A B C D E F G H S1 -3.6056 0.0006 0.0002 -0.0091 0.0008 0.0037 -0.0023 0.0006 -6E-05 S2 -9.0241 -0.0381 -0.0034 0.0057 0.0064 -0.0066 0.0021 -0.0002 0 S3 -2.5303 -0.0646 0.0638 -0.0489 0.0502 -0.0297 0.0079 -0.0003 -0.0002 S4 -90 -0.061 0.1445 -0.2496 0.2927 -0.227 0.1117 -0.0313 0.0037 S5 0 -0.0873 0.1992 -0.3055 0.3359 -0.2538 0.1258 -0.0363 0.0045 S6 4.7161 -0.0546 0.0965 -0.1239 0.0985 -0.0415 0.0003 0.0073 -0.0021 S7 0 -0.0683 0.0579 -0.1095 0.1139 -0.0757 0.0284 -0.0061 0.0009 S8 0 -0.1131 0.1074 -0.1248 0.0808 -0.0284 0.0031 0.0006 -1E-05 S9 -17.253 -0.0425 -0.0026 0.0281 -0.0272 0.0102 -0.0011 -0.0003 7E-05 S10 -15.241 -0.0436 -0.0118 0.0343 -0.0279 0.0119 -0.0029 0.0004 -2E-05 S11 0 0.0034 -0.0267 0.0138 -0.0061 0.0018 -0.0003 2E-05 -8E-07 S12 -1.2097 0.0895 -0.0603 0.0269 -0.0083 0.0018 -0.0003 2E-05 -7E-07 S13 -4.5375 -0.0806 0.0002 0.0144 -0.005 0.0008 -8E-05 4E-06 -8E-08 S14 -9.2133 -0.0675 0.0218 -0.005 0.0008 -1E-04 8E-06 -4E-07 7E-09

Tenth Example

FIG. 19 is a view illustrating a tenth example of an optical imaging system, and FIG. 20 illustrates aberration curves of the optical imaging system of FIG. 19 .

The tenth example of the optical imaging system includes a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, a sixth lens 1060, a seventh lens 1070, a filter 1080, an image sensor 1090, and a stop (not shown) disposed between the first lens 1010 and the second lens 1020.

The first lens 1010 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1020 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1030 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1040 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1050 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1060 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 1070 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1070. In particular, the object-side surface of the seventh lens 1070 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1070. In particular, the image-side surface of the seventh lens 1070 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 19 , the stop is disposed at a distance of 0.731 mm from the object-side surface of the first lens 1010 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 10 listed in Table 57 that appears later in this application.

Table 19 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 19 , and Table 20 below shows aspherical surface coefficients of the lenses of FIG. 19 . Both surfaces of all of the lenses of FIG. 19 are aspherical.

TABLE 19 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.732331 0.731243 1.546 56.114 1.250 S2 12.53699 0.070023 1.181 S3 Second Lens 5.589296 0.2 1.667 20.353 1.147 S4 2.573966 0.39715 1.100 S5 Third Lens 8.065523 0.384736 1.546 56.114 1.128 S6 7.836681 0.192591 1.247 S7 Fourth Lens 6.687158 0.244226 1.546 56.114 1.276 S8 30.32847 0.271297 1.374 S9 Fifth Lens -3.28742 0.24968 1.667 20.353 1.481 S10 -4.51593 0.138845 1.734 S11 Sixth Lens 5.679879 0.519865 1.546 56.114 2.150 S12 -1.89003 0.316634 2.318 S13 Seventh Lens -3.93255 0.3 1.546 56.114 2.640 S14 1.741826 0.193709 2.747 S15 Filter Infinity 0.11 1.518 64.166 3.146 S16 Infinity 0.78 3.177045639 S17 Imaging Plane Infinity 3.536356437

TABLE 20 K A B C D E F G H J S1 -0.7464 0.01386 0.03443 -0.0749 0.10292 -0.0706 0.01727 0.00423 -0.0023 0 S2 36.6688 -0.0823 0.19496 -0.3067 0.36336 -0.323 0.19024 -0.0632 0.00855 0 S3 -1.3559 -0.1603 0.33047 -0.4059 0.33245 -0.1787 0.06728 -0.0166 0.00178 0 S4 -0.4109 -0.0907 0.14443 0.1155 -0.7969 1.50089 -1.4406 0.72187 -0.147 0 S5 0 -0.0739 0.04629 -0.1203 0.11651 -0.0578 -0.0089 0.02328 -0.0057 0 S6 0 -0.0932 0.00341 0.05212 -0.1827 0.24566 -0.2173 0.11261 -0.0241 0 S7 25.1476 -0.1235 -0.1887 0.37626 -0.554 0.67306 -0.5796 0.27819 -0.0538 0 S8 -99 -9E-05 -0.3274 0.35885 -0.3195 0.34506 -0.2608 0.09954 -0.0144 0 S9 -70.894 0.02055 0.04825 -0.5284 0.75832 -0.4915 0.16359 -0.0271 0.00175 0 S10 2.28319 0.17594 -0.3448 0.22829 -0.0716 0.01095 -0.0007 -4E-06 1.4E-06 0 S11 -99 0.11875 -0.2169 0.16747 -0.0871 0.02755 -0.0049 0.00045 -2E-05 0 S12 -3.3067 0.16436 -0.1849 0.1159 -0.049 0.01383 -0.0024 0.00023 -9E-06 0 S13 -2.4772 -0.1026 -0.0482 0.07401 -0.0308 0.00666 -0.0008 5.5E-05 -2E-06 0 S14 -1.1028 -0.2935 0.20325 -0.1127 0.04574 -0.0129 0.0024 -0.0003 1.8E-05 -5E-07

Eleventh Example

FIG. 21 is a view illustrating an eleventh example of an optical imaging system, and FIG. 22 illustrates aberration curves of the optical imaging system of FIG. 21 .

The eleventh example of the optical imaging system includes a first lens 1110, a second lens 1120, a third lens 1130, a fourth lens 1140, a fifth lens 1150, a sixth lens 1160, a seventh lens 1170, a filter 1180, an image sensor 1190, and a stop (not shown) disposed between the first lens 1110 and the second lens 1120.

The first lens 1110 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1120 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1130 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1140 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1150 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1160 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 1170 has a negative refractive power, and a paraxial region of each of an object-side surface and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1170. In particular, the object-side surface of the seventh lens 1170 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1170. In particular, the image-side surface of the seventh lens 1170 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 21 , the stop is disposed at a distance of 0.731 mm from the object-side surface of the first lens 1110 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 11 listed in Table 57 that appears later in this application.

Table 21 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 21 , and Table 22 below shows aspherical surface coefficients of the lenses of FIG. 21 . Both surfaces of all of the lenses of FIG. 21 are aspherical.

TABLE 21 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.770763 0.730711 1.546 56.114 1.320 S2 14.17202 0.100163 1.273 S3 Second Lens 5.668898 0.18 1.667 20.353 1.211 S4 2.64742 0.372112 1.100 S5 Third Lens 8.43642 0.362306 1.546 56.114 1.132 S6 7.970624 0.229099 1.239 S7 Fourth Lens 6.86515 0.42272 1.546 56.114 1.274 S8 36.76921 0.245464 1.393 S9 Fifth Lens -3.17407 0.478139 1.667 20.353 1.445 S10 -4.17541 0.041087 1.772 S11 Sixth Lens 7.099919 0.552516 1.546 56.114 2.150 S12 -1.53067 0.261423 2.068 S13 Seventh Lens -2.51307 0.3 1.546 56.114 2.414 S14 1.797456 0.23426 2.679 S15 Filter Infinity 0.11 1.518 64.166 2.907 S16 Infinity 0.7799997 2.935720549 S17 Imaging Plane Infinity 3.264729521

TABLE 22 K A B C D E F G H J S1 -0.7681 0.01965 -0.0023 0.03216 -0.0725 0.09393 -0.0692 0.02709 -0.0045 0 S2 45.8003 -0.0479 0.07745 -0.054 -0.0476 0.13354 -0.1194 0.05034 -0.0084 0 S3 -2.8609 -0.1305 0.23846 -0.2908 0.23698 -0.1031 0.0108 0.00969 -0.003 0 S4 -0.8781 -0.0856 0.15126 -0.0468 -0.2774 0.65417 -0.6619 0.33681 -0.0673 0 S5 0 -0.0618 -0.0157 0.07733 -0.2544 0.39332 -0.3533 0.18049 -0.0399 0 S6 0 -0.0948 -0.0485 0.1701 -0.3674 0.41646 -0.2753 0.10654 -0.0195 0 S7 24.7714 -0.1253 -0.0916 0.07902 0.06606 -0.3032 0.34529 -0.1688 0.03094 0 S8 -99 -0.022 -0.2346 0.17869 -0.0276 -0.0274 0.02137 -0.0097 0.00223 0 S9 -49.881 -0.0321 0.01104 -0.3632 0.63755 -0.478 0.17949 -0.0322 0.002 0 S10 1.50394 0.14944 -0.3234 0.26404 -0.1034 0.01233 0.00452 -0.0017 0.00016 0 S11 -99 0.05255 -0.154 0.1443 -0.0834 0.02708 -0.0048 0.00044 -2E-05 0 S12 -2.9382 0.0764 -0.0567 0.02305 -0.0064 0.0012 -0.0001 8.7E-06 -2E-07 0 S13 -5.8244 -0.0197 -0.1042 0.09438 -0.036 0.00755 -0.0009 6E-05 -2E-06 0 S14 -0.9447 -0.2204 0.12723 -0.0644 0.02544 -0.0072 0.00137 -0.0002 1.1E-05 -3E-07

Twelfth Example

FIG. 23 is a view illustrating a twelfth example of an optical imaging system, and FIG. 24 illustrates aberration curves of the optical imaging system of FIG. 23 .

The twelfth example of the optical imaging system includes a first lens 1210, a second lens 1220, a third lens 1230, a fourth lens 1240, a fifth lens 1250, a sixth lens 1260, a seventh lens 1270, a filter 1280, an image sensor 1290, and a stop (not shown) disposed between the first lens 1210 and the second lens 1220.

The first lens 1210 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1220 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1230 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1240 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1250 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1260 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 1270 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1270. In particular, the object-side surface of the seventh lens 1270 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1270. In particular, the image-side surface of the seventh lens 1270 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 23 , the stop is disposed at a distance of 0.727 mm from the object-side surface of the first lens 1210 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 12 listed in Table 57 that appears later in this application.

Table 23 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 23 , and Table 24 below shows aspherical surface coefficients of the lenses of FIG. 23 . Both surfaces of all of the lenses of FIG. 23 are aspherical.

TABLE 23 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.725845 0.726326 1.546 56.114 1.310 S2 12.83315 0.055329 1.274 S3 Second Lens 5.358298 0.181707 1.667 20.353 1.218 S4 2.541322 0.401791 1.100 S5 Third Lens 8.435541 0.408349 1.546 56.114 1.131 S6 7.874557 0.186858 1.245 S7 Fourth Lens 6.705131 0.298547 1.546 56.114 1.272 S8 27.19617 0.256118 1.379 S9 Fifth Lens -3.28751 0.241636 1.667 20.353 1.449 S10 -4.34069 0.090002 1.647 S11 Sixth Lens 5.401728 0.493563 1.546 56.114 2.150 S12 -1.72062 0.282074 2.138 S13 Seventh Lens -3.99594 0.300688 1.546 56.114 2.363 S14 1.586532 0.212709 2.585 S15 Filter Infinity 0.11 1.518 64.166 2.904 S16 Infinity 0.78 2.93204801 S17 Imaging Plane Infinity 3.282195737

TABLE 24 K A B C D E F G H J S1 -0.7633 0.01527 0.01019 0.0604 -0.2258 0.35306 -0.2845 0.11676 -0.0196 0 S2 36.2518 -0.0857 0.28623 -0.6478 0.9663 -0.9184 0.52698 -0.1654 0.02147 0 S3 -2.2692 -0.1619 0.40214 -0.7024 0.86766 -0.7104 0.37031 -0.1094 0.01364 0 S4 -0.5501 -0.0782 0.07842 0.32154 -1.2153 1.98953 -1.7497 0.81604 -0.1565 0 S5 0 -0.0637 0.03982 -0.1864 0.37638 -0.5082 0.40475 -0.1698 0.02998 0 S6 0 -0.099 0.02 0.02036 -0.1635 0.24341 -0.2157 0.1109 -0.0238 0 S7 25.107 -0.1211 -0.2111 0.49819 -0.7382 0.7709 -0.5844 0.26919 -0.0523 0 S8 -99 0.00624 -0.3995 0.51975 -0.4722 0.40416 -0.2607 0.09371 -0.0133 0 S9 -69.265 0.08083 -0.1563 -0.2824 0.61355 -0.4491 0.15873 -0.0272 0.00181 0 S10 3.04238 0.24647 -0.5089 0.39539 -0.1641 0.04036 -0.006 0.00051 -2E-05 0 S11 -99 0.12569 -0.2316 0.18601 -0.0999 0.03252 -0.0059 0.00056 -2E-05 0 S12 -3.663 0.14498 -0.1575 0.09504 -0.0383 0.01029 -0.0017 0.00015 -6E-06 0 S13 -2.6499 -0.0877 -0.0968 0.12134 -0.0535 0.01276 -0.0017 0.00013 -4E-06 0 S14 -1.0624 -0.3185 0.22606 -0.1296 0.05544 -0.0167 0.00337 -0.0004 3.1E-05 -1E-06

Thirteenth Example

FIG. 25 is a view illustrating a thirteenth example of an optical imaging system, and FIG. 26 illustrates aberration curves of the optical imaging system of FIG. 25 .

The thirteenth example of the optical imaging system includes a first lens 1310, a second lens 1320, a third lens 1330, a fourth lens 1340, a fifth lens 1350, a sixth lens 1360, a seventh lens 1370, a filter 1380, an image sensor 1390, and a stop (not shown) disposed between the second lens 1320 and the third lens 1330.

The first lens 1310 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1320 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The third lens 1330 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1340 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1350 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 1360 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 1370 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 1370. In particular, the object-side surface of the seventh lens 1370 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

One inflection point is formed on the image-side surface of the seventh lens 1370. In particular, the image-side surface of the seventh lens 1370 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 25 , the stop is disposed at a distance of 1.158 mm from the object-side surface of the first lens 1310 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 13 listed in Table 57 that appears later in this application.

Table 25 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 25 , and Table 26 below shows aspherical surface coefficients of the lenses of FIG. 25 . Both surfaces of all of the lenses of FIG. 25 are aspherical.

TABLE 25 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.141 0.481 1.546 56.114 1.450 S2 3.251 0.110 1.350 S3 Second Lens 3.253 0.542 1.546 56.114 1.285 S4 -15.773 0.025 1.232 S5 Third Lens 8.425 0.230 1.679 19.236 1.157 S6 3.514 0.625 1.095 S7 Fourth Lens 25.986 0.296 1.679 19.236 1.265 S8 15.894 0.230 1.452 S9 Fifth Lens 3.048 0.400 1.546 56.114 1.675 S10 3.616 0.290 2.092 S11 Sixth Lens 3.762 0.400 1.679 19.236 2.153 S12 2.792 0.204 2.476 S13 Seventh Lens 1.614 0.510 1.537 53.955 2.938 S14 1.326 0.196 3.102 S15 Filter Infinity 0.110 1.518 64.197 3.420 S16 Infinity 0.65 3.450 S17 Imaging Plane Infinity 3.730

TABLE 26 K A B C D E F G H J S1 -8.038 0.07067 -0.0797 0.03339 0.00722 -0.0491 0.04654 -0.0186 0.00318 -0.0002 S2 -20.594 -0.0019 -0.1494 0.20409 -0.2922 0.37549 -0.3085 0.14861 -0.0387 0.0042 S3 -0.0908 -0.0339 -0.0641 0.13679 -0.2821 0.49215 -0.4815 0.26054 -0.0746 0.00881 S4 -0.4822 -0.0436 0.17605 -0.3256 0.19989 0.1916 -0.4291 0.32034 -0.1141 0.01622 S5 -1.1841 -0.1073 0.25445 -0.4683 0.49912 -0.2863 0.05651 0.03245 -0.0229 0.00442 S6 0.87331 -0.0693 0.03569 0.20478 -0.8833 1.73278 -1.9742 1.34645 -0.5106 0.08302 S7 -0.4999 -0.0314 0.01347 -0.2894 0.97164 -1.7181 1.79234 -1.1152 0.38365 -0.0563 S8 -1E-06 -0.0273 -0.1177 0.21199 -0.2544 0.21565 -0.1264 0.04694 -0.0093 0.0007 S9 -41.843 0.16235 -0.3487 0.40163 -0.3105 0.13962 -0.027 -0.0038 0.00264 -0.0003 S10 -5.1424 0.03971 -0.1364 0.15688 -0.1229 0.06333 -0.0212 0.0044 -0.0005 2.6E-05 S11 -2.1666 0.03558 -0.1809 0.19853 -0.1438 0.06411 -0.0173 0.00275 -0.0002 9E-06 S12 -0.0207 -0.1043 0.02386 -0.0063 -0.0007 0.00066 -3E-06 -4E-05 7.3E-06 -4E-07 S13 -0.7948 -0.4128 0.18634 -0.0516 0.01005 -0.0015 0.00016 -1E-05 6.2E-07 -1E-08 S14 -1.3226 -0.3105 0.17125 -0.0712 0.02129 -0.0043 0.00058 -5E-05 2.3E-06 -5E-08

Fourteenth Example

FIG. 27 is a view illustrating a fourteenth example of an optical imaging system, and FIG. 28 illustrates aberration curves of the optical imaging system of FIG. 27 .

The fourteenth optical imaging system includes a first lens 1410, a second lens 1420, a third lens 1430, a fourth lens 1440, a fifth lens 1450, a sixth lens 1460, a seventh lens 1470, a filter 1480, an image sensor 1490, and a stop (not shown) disposed between the second lens 1420 and the third lens 1430.

The first lens 1410 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1420 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1430 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1440 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1450 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 1460 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 1470 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1470. In particular, the object-side surface of the seventh lens 1470 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1470. In particular, the image-side surface of the seventh lens 1470 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 27 , the stop is disposed at a distance of 1.080 mm from the object-side surface of the first lens 1410 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 14 listed in Table 57 that appears later in this application.

Table 27 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 27 , and Table 28 below shows aspherical surface coefficients of the lenses of FIG. 27 . Both surfaces of all of the lenses of FIG. 27 are aspherical.

TABLE 27 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.136724381 0.486053 1.546 56.114 1.360 S2 2.889766837 0.087572 1.331 S3 Second Lens 3.197028762 0.481363 1.546 56.114 1.301 S4 109.2678078 0.025 1.264 S5 Third Lens 8.21648334 0.333222 1.679 19.236 1.218 S6 3.643026543 0.428709 1.229 S7 Fourth Lens 5.149363024 0.374385 1.546 56.114 1.353 S8 7.983541153 0.393693 1.392 S9 Fifth Lens 3.813432353 0.4 1.546 56.114 1.576 S10 4.85043033 0.288816 2.010 S11 Sixth Lens 3.891285923 0.4 1.546 56.114 1.916 S12 3.082484661 0.229858 2.371 S13 Seventh Lens 1.601117752 0.493312 1.546 56.114 2.526 S14 1.214247159 0.218016 2.787 S15 Filter Infinity 0.21 1.518 64.197 3.238 S16 Infinity 0.649932 3.316 S17 Imaging Plane Infinity 3.728

TABLE 28 K A B C D E F G H J S1 -1 -0.0136 0.02467 -0.0811 0.09254 -0.0456 -0.0139 0.02747 -0.0118 0.0017 S2 -13.222 0.01839 -0.091 -0.0856 0.30551 -0.3421 0.22925 -0.0976 0.02376 -0.0025 S3 -1.2237 -0.0255 0.01296 -0.2994 0.64916 -0.662 0.40893 -0.1567 0.03316 -0.0029 S4 -7.0515 -0.018 0.09424 -0.4684 1.19648 -1.7785 1.59837 -0.8543 0.24924 -0.0305 S5 8.98852 -0.0606 0.14701 -0.5476 1.41458 -2.2793 2.23564 -1.2976 0.41058 -0.0546 S6 1.65557 -0.053 0.06637 -0.1724 0.48815 -0.9461 1.10918 -0.7563 0.27857 -0.0429 S7 -4.3409 -0.0524 -0.0067 0.12439 -0.3711 0.55033 -0.4701 0.22801 -0.0561 0.0052 S8 5.85886 -0.0866 0.12995 -0.4361 0.91566 -1.2163 1.00858 -0.506 0.14047 -0.0165 S9 -43.521 0.08526 -0.1755 0.22567 -0.2234 0.15386 -0.0732 0.02213 -0.0038 0.00029 S10 -3.1047 0.0435 -0.1427 0.1592 -0.1109 0.05004 -0.0153 0.00308 -0.0004 1.9E-05 S11 -16.199 0.12636 -0.2435 0.25714 -0.2182 0.11759 -0.0381 0.00724 -0.0007 3.2E-05 S12 0.17584 -0.0767 0.07339 -0.0745 0.03369 -0.008 0.00106 -7E-05 2.3E-06 -1E-08 S13 -0.8173 -0.4272 0.20439 -0.0489 0.00204 0.00211 -0.0006 8.5E-05 -6E-06 1.6E-07 S14 -1.397 -0.3515 0.23363 -0.1198 0.04471 -0.0113 0.00187 -0.0002 1.1E-05 -3E-07

Fifteenth Example

FIG. 29 is a view illustrating a fifteenth example of an optical imaging system, and FIG. 30 illustrates aberration curves of the optical imaging system of FIG. 29 .

The fifteenth example of the optical imaging system includes a first lens 1510, a second lens 1520, a third lens 1530, a fourth lens 1540, a fifth lens 1550, a sixth lens 1560, a seventh lens 1570, a filter 1580, an image sensor 1590, and a stop (not shown) disposed between the second lens 1520 and the third lens 1530.

The first lens 1510 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1520 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1530 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1540 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1550 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 1560 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 1570 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1570. In particular, the object-side surface of the seventh lens 1570 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1570. In particular, the image-side surface of the seventh lens 1570 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 29 , the stop is disposed at a distance of 1.178 mm from the object-side surface of the first lens 1510 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 15 listed in Table 57 that appears later in this application.

Table 29 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 29 , and Table 30 below shows aspherical surface coefficients of the lenses of FIG. 29 . Both surfaces of all of the lenses of FIG. 29 are aspherical.

TABLE 29 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.367386627 0.52496 1.546 56.114 1.449 S2 3.194732034 0.05968 1.420 S3 Second Lens 3.420339572 0.567044 1.546 56.114 1.396 S4 70.97375214 0.026546 1.328 S5 Third Lens 7.778333323 0.350469 1.679 19.236 1.286 S6 3.816229093 0.409426 1.313 S7 Fourth Lens 5.591688642 0.369187 1.546 56.114 1.426 S8 7.993916661 0.39653 1.495 S9 Fifth Lens 4.100335907 0.426003 1.546 56.114 1.707 S10 5.37283934 0.303377 1.986 S11 Sixth Lens 4.360928988 0.424063 1.679 19.236 1.999 S12 3.568454408 0.223456 2.401 S13 Seventh Lens 1.78787121 0.541352 1.546 56.114 2.495 S14 1.397505481 0.200463 2.837 S15 Filter Infinity 0.21 1.518 64.197 3.186 S16 Infinity 0.832254 3.255759682 S17 Imaging Plane Infinity 3.785091526

TABLE 30 K A B C D E F G H J S1 -1 -0.006 -0.0037 -0.012 0.01197 0.01356 -0.0351 0.02669 -0.009 0.00115 S2 -13.101 0.01484 -0.0546 -0.0452 0.12694 -0.1111 0.05601 -0.0175 0.00311 -0.0002 S3 -1.2472 -0.0205 0.01627 -0.1488 0.25175 -0.2171 0.12177 -0.045 0.00972 -0.0009 S4 -7.0515 -0.0205 0.10486 -0.3805 0.75149 -0.8792 0.62566 -0.2656 0.06174 -0.006 S5 8.9156 -0.0324 -0.0045 0.06384 -0.1003 0.05665 0.00724 -0.0234 0.01032 -0.0015 S6 1.66379 -0.0267 -0.1125 0.59826 -1.3543 1.7261 -1.3193 0.59994 -0.1494 0.01566 S7 -4.619 -0.0378 -0.0049 0.06442 -0.1511 0.17871 -0.1225 0.04791 -0.0096 0.00073 S8 5.61159 -0.0667 0.14302 -0.4869 0.93128 -1.0571 0.72412 -0.2938 0.06506 -0.006 S9 -44.124 0.05707 -0.0758 0.04539 -0.0145 0.00087 5.3E-05 0.00022 -8E-05 9.1E-06 S10 -4.9813 0.03529 -0.0999 0.10243 -0.0647 0.02598 -0.0068 0.0011 -0.0001 4E-06 S11 -15.42 0.09903 -0.1649 0.14824 -0.1003 0.04259 -0.0109 0.00165 -0.0001 4.7E-06 S12 0.17905 -0.0585 0.05308 -0.0451 0.01769 -0.0038 0.00049 -4E-05 1.5E-06 -3E-08 S13 -0.825 -0.303 0.11661 -0.0228 0.00114 0.00047 -0.0001 1.2E-05 -7E-07 1.5E-08 S14 -1.3872 -0.2937 0.18771 -0.0863 0.0269 -0.0055 0.00073 -6E-05 2.7E-06 -5E-08

Sixteenth Example

FIG. 31 is a view illustrating a sixteenth example of an optical imaging system, and FIG. 32 illustrates aberration curves of the optical imaging system of FIG. 31 .

The sixteenth example of the optical imaging system includes a first lens 1610, a second lens 1620, a third lens 1630, a fourth lens 1640, a fifth lens 1650, a sixth lens 1660, a seventh lens 1670, a filter 1680, an image sensor 1690, and a stop (not shown) disposed in front of the first lens 1610.

The first lens 1610 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1620 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1630 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1640 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1650 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1660 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 1670 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1670. In particular, the object-side surface of the seventh lens 1670 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1670. In particular, the image-side surface of the seventh lens 1670 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 31 , the stop is disposed at a distance of 0.250 mm from the object-side surface of the first lens 1610 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 16 listed in Table 57 that appears later in this application.

Table 31 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 31 , and Table 32 below shows aspherical surface coefficients of the lenses of FIG. 31 . Both surfaces of all of the lenses of FIG. 31 are aspherical.

TABLE 31 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.721083 0.634874 1.5441 56.1138 1.100 S2 11.45706 0.121172 1.071 S3 Second Lens 119.1721 0.203286 1.6612 20.3532 1.057 S4 4.475787 0.084345 1.043 S5 Third Lens 4.525763 0.310946 1.5441 56.1138 1.051 S6 20.60825 0.215768 1.015 S7 Fourth Lens 13.21519 0.236935 1.5441 56.1138 1.019 S8 16.27332 0.210349 1.070 S9 Fifth Lens -6.57315 0.41188 1.651 21.4942 1.076 S10 -10.4553 0.371031 1.320 S11 Sixth Lens 3.477886 0.631775 1.5441 56.1138 1.556 S12 3.199354 0.267164 2.337 S13 Seventh Lens 2.880384 0.505977 1.5441 56.1138 2.489 S14 1.71E+00 0.138438 2.666 S15 Filter Infinity 0.21 1.5182 64.1973 3.102058013 S16 Infinity 0.59 3.177033741 S17 Imaging Plane Infinity 3.529142415

TABLE 32 K A B C D E F G H S1 0.0432 -0.0088 0.0131 -0.0627 0.1199 -0.1345 0.077 -0.018 -0.0004 S2 -26.097 -0.0562 0.051 -0.0514 0.0595 -0.0683 0.0462 -0.0139 -7E-05 S3 -99 -0.1283 0.1953 -0.2779 0.5135 -0.8812 0.9662 -0.5723 0.1395 S4 -16.567 -0.0971 0.1552 -0.3608 0.985 -2.059 2.5647 -1.6683 0.4378 S5 -1.6774 -0.0377 0.065 -0.4515 1.687 -3.5163 4.2391 -2.6607 0.6752 S6 57.913 -0.0559 0.0533 -0.341 1.3373 -2.8539 3.4811 -2.2114 0.5781 S7 -66.305 -0.1749 -0.0635 0.0963 -0.2061 0.5819 -0.9 0.6874 -0.1979 S8 19.549 -0.1228 -0.0686 0.0207 0.1647 -0.2695 0.1725 -0.0616 0.0161 S9 29.709 -0.0709 0.0826 -0.3062 0.6009 -0.6459 0.3344 -0.0761 0 S10 -31.338 -0.1255 0.1076 -0.1494 0.1908 -0.1423 0.0506 -0.0065 0 S11 -46.453 0.0038 -0.1455 0.1534 -0.126 0.0705 -0.0225 0.0029 0 S12 -31.504 0.0093 -0.0326 0.0149 -0.0033 0.0003 -1E-05 -7E-07 0 S13 -0.5233 -0.2947 0.1709 -0.0627 0.0154 -0.0025 0.0003 -1E-05 3E-07 S14 -0.8257 -0.2584 0.1353 -0.0565 0.0166 -0.0032 0.0004 -3E-05 7E-07

Seventeenth Example

FIG. 33 is a view illustrating a seventeenth example of an optical imaging system, and FIG. 34 illustrates aberration curves of the optical imaging system of FIG. 33 .

The seventeenth example of the optical imaging system includes a first lens 1710, a second lens 1720, a third lens 1730, a fourth lens 1740, a fifth lens 1750, a sixth lens 1760, a seventh lens 1770, a filter 1780, an image sensor 1790, and a stop (not shown) disposed between the first lens 1710 and the second lens 1720.

The first lens 1710 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1720 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1730 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1740 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fifth lens 1750 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1760 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 1770 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1770. In particular, the object-side surface of the seventh lens 1770 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1770. In particular, the image-side surface of the seventh lens 1770 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 33 , the stop is disposed at a distance of 0.624 mm from the object-side surface of the first lens 1710 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 17 listed in Table 57 that appears later in this application.

Table 33 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 33 , and Table 34 below shows aspherical surface coefficients of the lenses of FIG. 33 . Both surfaces of all of the lenses of FIG. 33 are aspherical.

TABLE 33 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.777275 0.623828 1.5441 56.1138 1.217 S2 6.456568 0.1 1.158 S3 Second Lens 4.41033 0.236253 1.6612 20.3532 1.157 S4 2.658351 0.413785 1.184 S5 Third Lens 6.587882 0.464049 1.5441 56.1138 1.177 S6 10.52328 0.17773 1.282 S7 Fourth Lens 13.47488 0.362661 1.5441 56.1138 1.306 S8 -20.23 0.232536 1.444 S9 Fifth Lens -3.18309 0.2 1.6612 20.3532 1.456 S10 -4.21505 0.1 1.625 S11 Sixth Lens 6.764633 0.608917 1.5441 56.1138 2.207 S12 -2.87919 0.421093 2.145 S13 Seventh Lens -6.99582 0.32 1.5441 56.1138 2.280 S14 1.69E+00 0.14847 3.165 S15 Filter Infinity 0.11 1.5183 64.1664 2.850141022 S16 Infinity 0.680678 2.888122651 S17 Imaging Plane Infinity 3.276451571

TABLE 34 K A B C D E F G H J S1 -0.5383 0.0108 0.0209 -0.0477 0.0729 -0.06 0.0243 -0.0027 -0.0007 0 S2 5.8135 -0.0459 0.0189 0.0248 -0.0559 0.0486 -0.026 0.0094 -0.0019 0 S3 -10.011 -0.085 0.066 0.02 -0.0808 0.0756 -0.0332 0.0069 -0.0006 0 S4 -0.1875 -0.0544 0.0068 0.26 -0.6655 0.9329 -0.7519 0.3313 -0.061 0 S5 0 -0.0569 0.0063 -0.0275 -0.0046 0.0401 -0.0485 0.0264 -0.0053 0 S6 0 -0.0775 -0.0976 0.271 -0.5329 0.5567 -0.3323 0.1128 -0.0176 0 S7 47.015 -0.0863 -0.1024 0.2298 -0.2721 0.1091 0.0392 -0.0378 0.0065 0 S8 -99 -0.0603 -0.0348 0.057 -0.0468 0.0241 -0.007 0.001 -6E-05 0 S9 -99 -0.2672 0.6153 -0.9745 0.9138 -0.5236 0.1786 -0.0332 0.0026 0 S10 -0.0701 0.0268 -0.0377 -0.0253 0.035 -0.0133 0.0024 -0.0002 7E-06 0 S11 -97.721 0.1556 -0.2109 0.1424 -0.0678 0.02 -0.0033 0.0003 -1E-05 0 S12 -1.5998 0.2298 -0.1811 0.0905 -0.0342 0.0088 -0.0014 0.0001 -4E-06 0 S13 4.8341 -0.1142 -0.0024 0.0306 -0.013 0.0027 -0.0003 2E-05 -5E-07 0 S14 -1.0993 -0.2618 0.1449 -0.0599 0.0171 -0.0032 0.0004 -3E-05 1E-06 -2E-08

Eighteenth Example

FIG. 35 is a view illustrating an eighteenth example of an optical imaging system, and FIG. 36 illustrates aberration curves of the optical imaging system of FIG. 35 .

The eighteenth example of the optical imaging system includes a first lens 1810, a second lens 1820, a third lens 1830, a fourth lens 1840, a fifth lens 1850, a sixth lens 1860, a seventh lens 1870, a filter 1880, an image sensor 1890, and a stop (not shown) disposed between the first lens 1810 and the second lens 1820.

The first lens 1810 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1820 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1830 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1840 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 1850 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1860 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 1870 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

No inflection point is formed on the object-side surface of the seventh lens 1870.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1870. In particular, the image-side surface of the seventh lens 1870 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 35 , the stop is disposed at a distance of 0.641 mm from the object-side surface of the first lens 1810 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 18 listed in Table 57 that appears later in this application.

Table 35 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 35 , and Table 36 below shows aspherical surface coefficients of the lenses of FIG. 35 . Both surfaces of all of the lenses of FIG. 35 are aspherical.

TABLE 35 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.797739 0.640884 1.5441 56.1138 1.270 S2 3.742203 0.119077 1.211 S3 Second Lens 3.057321 0.22 1.6612 20.3532 1.190 S4 2.795092 0.393079 1.130 S5 Third Lens 10.62153 0.464034 1.5441 56.1138 1.153 S6 9.026562 0.1 1.289 S7 Fourth Lens 7.987624 0.36214 1.5441 56.1138 1.328 S8 138.7678 0.233384 1.454 S9 Fifth Lens -4.1765 0.219829 1.6612 20.3532 1.518 S10 -4.13945 0.1 1.656 S11 Sixth Lens 4.613403 0.608917 1.5441 56.1138 2.000 S12 -3.59211 0.472598 2.038 S13 Seventh Lens -7.00157 0.32 1.5441 56.1138 2.049 S14 1.69E+00 0.110689 2.685 S15 Filter Infinity 0.21 1.5183 64.1664 2.941536401 S16 Infinity 0.549988 3.008025404 S17 Imaging Plane Infinity 3.291609937

TABLE 36 K A B C D E F G H J S1 -0.812 0.0136 0.0311 -0.0769 0.1226 -0.1099 0.0531 -0.0116 0.0005 0 S2 -6.6917 -0.0631 0.0174 0.0714 -0.1648 0.1763 -0.1086 0.0376 -0.0059 0 S3 -14.579 -0.0707 0.0068 0.1319 -0.2129 0.173 -0.0715 0.0127 -0.0005 0 S4 -0.188 -0.0614 -0.0138 0.3338 -0.7392 0.9251 -0.6781 0.276 -0.0477 0 S5 0 -0.0572 0.0435 -0.1733 0.2724 -0.2421 0.0931 -0.0042 -0.0038 0 S6 0 -0.1356 -0.0309 0.2183 -0.5547 0.6931 -0.486 0.1856 -0.0304 0 S7 30.023 -0.2107 0.0007 0.1568 -0.2854 0.2586 -0.1154 0.0236 -0.0019 0 S8 -99 -0.1858 -0.0192 0.2616 -0.4111 0.3392 -0.1538 0.0357 -0.0033 0 S9 -98.995 -0.2935 0.5043 -0.5157 0.2657 -0.0658 0.0056 0.0005 -8E-05 0 S10 -0.0701 -0.0775 0.2223 -0.2703 0.1529 -0.0452 0.0073 -0.0006 2E-05 0 S11 -97.878 0.1479 -0.1956 0.1288 -0.0598 0.0172 -0.0028 0.0002 -8E-06 0 S12 1.4166 0.1234 -0.1416 0.087 -0.0341 0.0088 -0.0014 0.0001 -4E-06 0 S13 9.5503 -0.2864 0.1096 0.0149 -0.0214 0.0064 -0.0009 6E-05 -2E-06 0 S14 -1.2786 -0.3076 0.1777 -0.0626 0.0143 -0.0022 0.0002 -1E-05 5E-07 -7E-09

Nineteenth Example

FIG. 37 is a view illustrating a nineteenth example of an optical imaging system, and FIG. 38 illustrates aberration curves of the optical imaging system of FIG. 37 .

The nineteenth example of the optical imaging system includes a first lens 1910, a second lens 1920, a third lens 1930, a fourth lens 1940, a fifth lens 1950, a sixth lens 1960, a seventh lens 1970, a filter 1980, an image sensor 1990, and a stop (not shown) disposed between the second lens 1920 and the third lens 1930.

The first lens 1910 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 1920 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 1930 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 1940 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fifth lens 1950 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 1960 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 1970 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 1970. In particular, the object-side surface of the seventh lens 1970 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 1970. In particular, the image-side surface of the seventh lens 1970 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 37 , the stop is disposed at a distance of 0.950 mm from the object-side surface of the first lens 1910 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 19 listed in Table 57 that appears later in this application.

Table 37 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 37 , and Table 38 below shows aspherical surface coefficients of the lenses of FIG. 37 . Both surfaces of all of the lenses of FIG. 37 are aspherical.

TABLE 37 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.672254 0.7738 1.55 56.11 1.35 S2 6.857015 0.02 1.26 S3 Second Lens 2.191778 0.15 1.66 20.40 1.14 S4 1.616242 0.342515 1.00 S5 Third Lens 4.211432 0.212112 1.66 20.40 0.99 S6 3.706663 0.17539 1.07 S7 Fourth Lens 13.05984 0.552722 1.55 56.11 1.17 S8 -10.8786 0.321736 1.34 S9 Fifth Lens -7.26453 0.16548 1.65 21.49 1.45 S10 -20.0451 0.129473 1.73 S11 Sixth Lens 6.652839 0.862773 1.65 21.49 1.73 S12 6.231677 0.142 2.30 S13 Seventh Lens 2.11211 0.562819 1.54 55.71 3.10 S14 1.545997 0.207518 2.87 S15 Filter Infinity 0.11 1.52 64.20 3.16 S16 Infinity 0.530999 3.20 S17 Imaging Plane Infinity 3.54

TABLE 38 K A B C D E F G H S1 -0.0875 0.0043 0.0051 -0.0107 0.0157 -0.0116 0.0042 -0.0006 0 S2 25.239 -0.0649 0.2073 -0.4137 0.472 -0.3196 0.119 -0.019 0 S3 -1.7461 -0.1041 0.3118 -0.5508 0.6169 -0.4129 0.1566 -0.0264 0 S4 -0.0238 -0.0685 0.11 -0.0081 -0.2137 0.4018 -0.2921 0.0875 0 S5 0.8405 -0.0823 0.0538 -0.0046 -0.0765 0.1601 -0.1299 0.0421 0 S6 6.608 -0.1086 0.0588 -0.0507 0.048 -0.0168 0.001 0.0003 0 S7 21.918 -0.0385 -0.0011 0.0112 -0.0177 0.0301 -0.0163 0.0027 0 S8 25.736 -0.0248 -0.0082 -0.0047 0.0083 -0.0029 0.0004 -2E-05 0 S9 1.6857 -0.0267 0.0322 -0.1034 0.0865 -0.0378 0.0096 -0.0012 0 S10 69.409 -0.0298 0.003 -0.0334 0.0256 -0.0076 0.001 -5E-05 0 S11 -52.836 0.0057 -0.0573 0.0402 -0.0183 0.0046 -0.0006 3E-05 0 S12 -34.09 -0.0239 -0.0095 0.0073 -0.0028 0.0006 -6E-05 3E-06 0 S13 -0.9427 -0.2417 0.0607 -0.0015 -0.0024 0.0006 -7E-05 4E-06 -8E-08 S14 -1.0048 -0.2102 0.0796 -0.0236 0.0052 -0.0008 7E-05 -3E-06 7E-08

Twentieth Example

FIG. 39 is a view illustrating a twentieth example of an optical imaging system, and FIG. 40 illustrates aberration curves of the optical imaging system of FIG. 39 .

The twentieth example of the optical imaging system includes a first lens 2010, a second lens 2020, a third lens 2030, a fourth lens 2040, a fifth lens 2050, a sixth lens 2060, a seventh lens 2070, a filter 2080, an image sensor 2090, and a stop (not shown) disposed between the second lens 2020 and the third lens 2030.

The first lens 2010 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2020 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2030 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2040 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The fifth lens 2050 has a negative refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 2060 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 2070 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 2070. In particular, the object-side surface of the seventh lens 2070 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2070. In particular, the image-side surface of the seventh lens 2070 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 39 , the stop is disposed at a distance of 0.940 mm from the object-side surface of the first lens 2010 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 20 listed in Table 57 that appears later in this application.

Table 39 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 39 , and Table 40 below shows aspherical surface coefficients of the lenses of FIG. 39 . Both surfaces of all of the lenses of FIG. 39 are aspherical.

TABLE 39 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.672254 0.763038 1.55 56.11 1.36 S2 6.857015 0.02 1.28 S3 Second Lens 2.191778 0.15 1.66 20.40 1.16 S4 1.616242 0.376845 1.03 S5 Third Lens 4.211432 0.216572 1.66 20.40 0.99 S6 3.706663 0.1647 1.06 S7 Fourth Lens 13.05984 0.453662 1.55 56.11 1.15 S8 -10.8786 0.306645 1.29 S9 Fifth Lens -7.26453 0.212383 1.65 21.49 1.46 S10 -20.0451 0.110875 1.73 S11 Sixth Lens 6.652839 0.862773 1.65 21.49 1.73 S12 6.231677 0.152019 2.30 S13 Seventh Lens 2.11211 0.629635 1.54 55.71 3.10 S14 1.545997 0.195628 2.89 S15 Filter Infinity 0.11 1.52 64.20 3.18 S16 Infinity 0.536692 3.22 S17 Imaging Plane Infinity 3.53

TABLE 40 K A B C D E F G H S1 -0.0875 0.0043 0.0051 -0.0107 0.0157 -0.0116 0.0042 -0.0006 0 S2 25.239 -0.0649 0.2073 -0.4137 0.472 -0.3196 0.119 -0.019 0 S3 -1.7461 -0.1041 0.3118 -0.5508 0.6169 -0.4129 0.1566 -0.0264 0 S4 -0.0238 -0.0685 0.11 -0.0081 -0.2137 0.4018 -0.2921 0.0875 0 S5 0.8405 -0.0823 0.0538 -0.0046 -0.0765 0.1601 -0.1299 0.0421 0 S6 6.608 -0.1086 0.0588 -0.0507 0.048 -0.0168 0.001 0.0003 0 S7 21.918 -0.0385 -0.0011 0.0112 -0.0177 0.0301 -0.0163 0.0027 0 S8 25.736 -0.0248 -0.0082 -0.0047 0.0083 -0.0029 0.0004 -2E-05 0 S9 1.6857 -0.0267 0.0322 -0.1034 0.0865 -0.0378 0.0096 -0.0012 0 S10 69.409 -0.0298 0.003 -0.0334 0.0256 -0.0076 0.001 -5E-05 0 S11 -52.836 0.0057 -0.0573 0.0402 -0.0183 0.0046 -0.0006 3E-05 0 S12 -34.09 -0.0239 -0.0095 0.0073 -0.0028 0.0006 -6E-05 3E-06 0 S13 -0.9427 -0.2417 0.0607 -0.0015 -0.0024 0.0006 -7E-05 4E-06 -8E-08 S14 -1.0048 -0.2102 0.0796 -0.0236 0.0052 -0.0008 7E-05 -3E-06 7E-08

Twenty-First Example

FIG. 41 is a view illustrating a twenty-first example of an optical imaging system, and FIG. 42 illustrates aberration curves of the optical imaging system of FIG. 41 .

The twenty-first example of the optical imaging system includes a first lens 2110, a second lens 2120, a third lens 2130, a fourth lens 2140, a fifth lens 2150, a sixth lens 2160, a seventh lens 2170, a filter 2180, an image sensor 2190, and a stop (not shown) disposed between the second lens 2120 and the third lens 2130.

The first lens 2110 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2120 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2130 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2140 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2150 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2160 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The seventh lens 2170 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 2170. In particular, the object-side surface of the seventh lens 2170 is concave in the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2170. In particular, the image-side surface of the seventh lens 2170 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 41 , the stop is disposed at a distance of 1.002 mm from the object-side surface of the first lens 2110 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 21 listed in Table 57 that appears later in this application.

Table 41 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 41 , and Table 42 below shows aspherical surface coefficients of the lenses of FIG. 41 . Both surfaces of all of the lenses of FIG. 41 are aspherical.

TABLE 41 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.804711 0.576863 1.544 56.114 1.270 S2 5.010949 0.040641 1.230 S3 Second Lens 4.809505 0.35454 1.544 56.114 1.204 S4 14.18784 0.03 1.158 S5 Third Lens 3.659167 0.2 1.661 20.350 1.087 S6 2.148667 0.424854 1.050 S7 Fourth Lens 21.5791 0.365358 1.544 56.114 1.050 S8 9.699008 0.061882 1.187 S9 Fifth Lens 6.23061 0.282527 1.639 21.525 1.212 S10 8.496966 0.34789 1.367 S11 Sixth Lens 10.18469 0.58471 1.544 56.114 1.650 S12 -1.51715 0.356227 1.934 S13 Seventh Lens -2.7118 0.3 1.544 56.114 2.303 S14 2.063638 0.164562 2.650 S15 Filter Infinity 0.21 1.518 64.197 2.938 S16 Infinity 0.639942 2.969 S17 Imaging Plane Infinity 3.261

TABLE 42 K A B C D E F G H S1 -1.5984 0.02201 0.00112 -0.0095 0.00713 -0.0076 0.00279 -0.0002 0 S2 0 -0.0267 -0.08 0.12037 -0.1085 0.07767 -0.0361 0.00741 0 S3 0 0.01852 -0.0944 0.1151 -0.0877 0.07128 -0.0433 0.01041 0 S4 93.0315 -0.0833 0.30018 -0.6564 0.78727 -0.5697 0.2292 -0.0392 0 S5 -11.518 -0.2115 0.48742 -0.8074 0.95087 -0.7204 0.32387 -0.0644 0 S6 -4.4222 -0.0999 0.19853 -0.0999 -0.0975 0.27732 -0.2246 0.0743 0 S7 0 -0.0315 -0.1501 0.44969 -1.0958 1.44445 -1.0093 0.2957 0 S8 0 -0.1532 -0.084 0.36754 -0.5986 0.47504 -0.1986 0.03659 0 S9 -76.367 -0.2472 -0.1038 0.53081 -0.6528 0.42248 -0.1503 0.02265 0 S10 0 -0.1927 -0.1015 0.31685 -0.3163 0.19124 -0.0703 0.01153 0 S11 0 0.02452 -0.0539 -0.0674 0.10823 -0.0625 0.01679 -0.0017 0 S12 -1.5099 0.20226 -0.1451 0.00041 0.04309 -0.0194 0.00346 -0.0002 0 S13 -6.0002 0.00897 -0.1914 0.15961 -0.0593 0.01227 -0.0015 9.7E-05 -3E-06 S14 -0.8696 -0.1901 0.07654 -0.0229 0.00487 -0.0008 8.7E-05 -6E-06 2.5E-07

Twenty-Second Example

FIG. 43 is a view illustrating a twenty-second example of an optical imaging system, and FIG. 44 illustrates aberration curves of the optical imaging system of FIG. 43 .

The twenty-second optical imaging system includes a first lens 2210, a second lens 2220, a third lens 2230, a fourth lens 2240, a fifth lens 2250, a sixth lens 2260, a seventh lens 2270, a filter 2280, an image sensor 2290, a first stop (not shown) disposed between the first lens 2210 and the second lens 2220, and a second stop (not shown) disposed between the second lens 2220 and the third lens 2230.

The first lens 2210 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2220 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2230 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2240 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2250 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 2260 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The seventh lens 2270 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

No inflection point is formed on the object-side surface of the seventh lens 2270.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2270. In particular, the image-side surface of the seventh lens 2270 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 43 , the first stop is disposed at a distance of 0.745 mm from the object-side surface of the first lens 2210 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 22 listed in Table 57 that appears later in this application.

Table 43 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 43 , and Table 44 below shows aspherical surface coefficients of the lenses of FIG. 43 . The first stop disposed between the first lens 2210 and the second lens 2220 as discussed above is not shown in Table 43. Both surfaces of all of the lenses of FIG. 43 are aspherical.

TABLE 43 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.900246 0.745113 1.546 56.114 1.333 S2 12.01797 0.031785 1.275 S3 Second Lens 7.105147 0.228148 1.667 20.353 1.244 S4 3.509972 0.348758 1.141 S5 Second Stop Infinity 0 1.205 S6 Third Lens 24.3886 0.459414 1.546 56.114 1.175 S7 62.53356 0.180582 1.274 S8 Fourth Lens 11.10403 0.28 1.667 20.353 1.280 S9 13.72056 0.379284 1.448 S10 Fifth Lens -4.77188 0.546513 1.546 56.114 1.853 S11 -1.71685 0.051852 2.170 S12 Sixth Lens -6.60097 0.558512 1.546 56.114 2.409 S13 -4.17937 0.372518 2.655 S14 Seventh Lens -4.57649 0.414815 1.546 56.114 3.009 S15 2.2E+00 0.141964 3.37037 S16 Filter Infinity 0.114074 1.518 64.16641 3.864216 S17 Infinity 0.746675 3.903345 S18 Imaging Plane Infinity 4.326018

TABLE 44 K A B C D E F G H J S1 -0.9474 0.01532 0.01685 -0.037 0.06054 -0.0609 0.03661 -0.0123 0.0017 0 S2 -30.447 -0.1419 0.43283 -0.798 0.97201 -0.7804 0.38946 -0.1078 0.01244 0 S3 6.01402 -0.1777 0.51041 -0.9603 1.25601 -1.0984 0.60482 -0.1853 0.02373 0 S4 -0.421 -0.0597 0.1562 -0.2512 0.29455 -0.2097 0.07608 -0.0015 -0.0042 0 S6 0 -0.0469 0.01011 -0.0076 -0.0395 0.08831 -0.0878 0.04425 -0.0087 0 S7 0 -0.116 0.09293 -0.2202 0.37209 -0.3982 0.24503 -0.0797 0.01043 0 S8 -7.5 -0.1862 0.04273 -0.0355 -0.0447 0.21236 -0.2603 0.13349 -0.0249 0 S9 -43.343 -0.1172 0.0133 0.00326 -0.0126 0.03781 -0.0404 0.01766 -0.0026 0 S10 -44.496 -0.0891 0.14043 -0.1469 0.09433 -0.0347 0.00517 0.00026 -0.0001 0 S11 -1.6506 0.07781 -0.0605 0.03731 -0.0172 0.00587 -0.0013 0.00015 -7E-06 0 S12 2.03896 0.16692 -0.1825 0.11151 -0.0456 0.01136 -0.0016 0.00012 -4E-06 0 S13 -0.4347 0.15501 -0.1544 0.08127 -0.0271 0.00578 -0.0008 5.4E-05 -2E-06 0 S14 -2.5068 -0.0042 -0.0908 0.05928 -0.017 0.00273 -0.0003 1.3E-05 -3E-07 0 S15 -1.4448 -0.1279 0.04264 -0.0109 0.00223 -0.0004 4E-05 -3E-06 1.2E-07 -2E-09

Twenty-Third Example

FIG. 45 is a view illustrating a twenty-third example of an optical imaging system, and FIG. 46 illustrates aberration curves of the optical imaging system of FIG. 45 .

The twenty-third example of the optical imaging system includes a first lens 2310, a second lens 2320, a third lens 2330, a fourth lens 2340, a fifth lens 2350, a sixth lens 2360, a seventh lens 2370, a filter 2380, an image sensor 2390, and a stop (not shown) disposed between the second lens 2320 and the third lens 2330.

The first lens 2310 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2320 has a positive refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is convex.

The third lens 2330 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2340 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2350 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2360 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 2370 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 2370. In particular, the object-side surface of the seventh lens 2370 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2370. In particular, the image-side surface of the seventh lens 2370 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 45 , the stop is disposed at a distance of 1.250 mm from the object-side surface of the first lens 2310 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 23 listed in Table 57 that appears later in this application.

Table 45 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 45 , and Table 46 below shows aspherical surface coefficients of the lenses of FIG. 45 . Both surfaces of all of the lenses of FIG. 45 are aspherical.

TABLE 45 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.266953728 0.4 1.546 56.114 1.380 S2 2.669137967 0.0250635 1.337 S3 Second Lens 2.623824881 0.8 1.546 56.114 1.337 S4 -11.8758231 0.025 1.298 S5 Third Lens 19.00320484 0.2526007 1.679 19.236 1.202 S6 4.067642359 0.4108424 1.242 S7 Fourth Lens 6.69913266 0.35 1.679 19.236 1.265 S8 7.219976522 0.4295582 1.369 S9 Fifth Lens 21.53098541 0.35 1.546 56.114 1.600 S10 7.891788096 0.025 1.853 S11 Sixth Lens 2.50304521 0.43 1.546 56.114 1.908 S12 2.4092608 0.2398918 2.372 S13 Seventh Lens 1.327452067 0.5253623 1.546 56.114 2.507 S14 1.19470686 0.3215245 2.738 S15 Filter Infinity 0.21 1.518 64.197 3.205 S16 Infinity 0.7051565 3.285 S17 Imaging Plane Infinity 3.781

TABLE 46 K A B C D E F G H J S1 -1 0.00124 -0.0631 0.08838 -0.0759 -0.0183 0.08244 -0.0602 0.01898 -0.0023 S2 -11.056 0.03802 0.1354 -0.9871 1.56411 -1.0995 0.32652 0.01084 -0.0287 0.00476 S3 -0.7436 -0.0807 0.57903 -1.9725 2.93458 -2.2115 0.82233 -0.0859 -0.0317 0.00756 S4 -7.2488 -0.1245 0.58766 -1.6544 2.89527 -3.2415 2.31185 -1.0127 0.24733 -0.0257 S5 12.3372 -0.1601 0.47507 -0.9119 1.14181 -0.9059 0.42126 -0.0904 -0.0021 0.0031 S6 -0.7614 -0.0925 0.17494 -0.2349 0.22825 -0.1666 0.07717 -0.0124 -0.0054 0.00212 S7 -12.018 0.04701 -0.734 2.69199 -5.8982 8.06267 -6.9318 3.6331 -1.0592 0.13158 S8 5.83969 -0.055 0.02382 -0.178 0.4679 -0.6732 0.58024 -0.2983 0.08447 -0.0101 S9 -43.467 0.02077 -0.0298 0.06441 -0.1157 0.10183 -0.0488 0.0125 -0.0016 7.1E-05 S10 -10.152 -0.0392 0.01463 0.02558 -0.0749 0.06753 -0.0305 0.00743 -0.0009 4.7E-05 S11 -16.19 0.09146 -0.1594 0.2045 -0.2282 0.1461 -0.0541 0.01173 -0.0014 6.9E-05 S12 -0.0871 -0.1985 0.32772 -0.3309 0.18662 -0.0647 0.01412 -0.0019 0.00014 -4E-06 S13 -0.8728 -0.462 0.28732 -0.1331 0.04466 -0.0104 0.00163 -0.0002 9.4E-06 -2E-07 S14 -1.5388 -0.3036 0.18437 -0.0807 0.02315 -0.0042 0.00046 -3E-05 1E-06 -1E-08

Twenty-Fourth Example

FIG. 47 is a view illustrating a twenty-fourth example of an optical imaging system, and FIG. 48 illustrates aberration curves of the optical imaging system of FIG. 47 .

The twenty-fourth example of the optical imaging system includes a first lens 2410, a second lens 2420, a third lens 2430, a fourth lens 2440, a fifth lens 2450, a sixth lens 2460, a seventh lens 2470, a filter 2480, an image sensor 2490, and a stop (not shown) disposed between the second lens 2420 and the third lens 2430.

The first lens 2410 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2420 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2430 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2440 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2450 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2460 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

The seventh lens 2470 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 2470. In particular, the object-side surface of the seventh lens 2470 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2470. In particular, the image-side surface of the seventh lens 2470 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 47 , the stop is disposed at a distance of 0.951 mm from the object-side surface of the first lens 2410 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 24 listed in Table 57 that appears later in this application.

Table 47 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 47 , and Table 48 below shows aspherical surface coefficients of the lenses of FIG. 47 . Both surfaces of all of the lenses of FIG. 47 are aspherical.

TABLE 47 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.747305824 0.6964434 1.546 56.114 1.280 S2 9.408357314 0.025 1.247 S3 Second Lens 2.976586304 0.23 1.667 20.353 1.150 S4 1.956424017 0.3428009 1.007 S5 Third Lens 16.8676436 0.2300239 1.667 20.353 1.032 S6 16.01257049 0.0294424 1.089 S7 Fourth Lens 7.314351738 0.356959 1.546 56.114 1.130 S8 17.39191974 0.3707783 1.228 S9 Fifth Lens 11.56172447 0.3608202 1.656 21.525 1.317 S10 6.918405514 0.2917084 1.657 S11 Sixth Lens -97.16346173 0.5907913 1.656 21.525 1.878 S12 17.27666898 0.0301253 2.338 S13 Seventh Lens 1.932241094 0.8257708 1.546 56.114 2.961 S14 1.739016534 0.2207138 3.015 S15 Filter Infinity 0.21 1.518 64.197 3.305 S16 Infinity 0.6498919 3.375 S17 Imaging Plane Infinity 3.731

TABLE 48 K A B C D E F G H J S1 -0.3029 0.00034 0.02484 -0.0645 0.08868 -0.0757 0.0373 -0.0109 0.00139 0 S2 0.99973 -0.0385 0.05948 -0.0639 0.00521 0.0552 -0.0624 0.02956 -0.0054 0 S3 -1.759 -0.0559 0.07693 -0.084 0.09591 -0.0711 0.03087 -0.0026 -0.0012 0 S4 -0.2233 -0.022 -0.0153 0.13577 -0.2648 0.33105 -0.2167 0.05099 0.00976 0 S5 -0.8179 -0.0092 -0.0103 -0.1607 0.63034 -1.1881 1.27457 -0.7449 0.18468 0 S6 -0.0005 0.01997 -0.1312 0.11419 -0.0014 0.0632 -0.1761 0.13356 -0.0335 0 S7 -31.717 0.02656 -0.0935 -0.0104 0.2126 -0.2049 0.0541 0.02004 -0.0098 0 S8 -1.0151 -0.0315 0.02884 -0.0714 0.09345 -0.1394 0.17678 -0.1344 0.05241 -0.0076 S9 0.382 -0.1094 0.03271 -0.0826 0.21377 -0.3162 0.24272 -0.0962 0.01564 0 S10 -27.524 -0.0394 -0.117 0.16282 -0.1238 0.05513 -0.0144 0.00227 -0.0002 0 S11 23.2031 0.18019 -0.2793 0.22076 -0.1258 0.0475 -0.0113 0.00159 -0.0001 0 S12 -49.948 0.03358 -0.0362 0.00983 -0.0011 -0.0001 7.6E-05 -1E-05 6.1E-07 0 S13 -1.8504 -0.2437 0.10759 -0.031 0.00661 -0.001 0.0001 -6E-06 1.5E-07 0 S14 -0.8299 -0.173 0.06293 -0.0196 0.00438 -0.0006 5.8E-05 -3E-06 6.1E-08 0

Twenty-Fifth Example

FIG. 49 is a view illustrating a twenty-fifth example of an optical imaging system, and FIG. 50 illustrates aberration curves of the optical imaging system of FIG. 49 .

The twenty-fifth example of the optical imaging system includes a first lens 2510, a second lens 2520, a third lens 2530, a fourth lens 2540, a fifth lens 2550, a sixth lens 2560, a seventh lens 2570, a filter 2580, an image sensor 2590, and a stop (not shown) disposed between the second lens 2520 and the third lens 2530.

The first lens 2510 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2520 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2530 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The fourth lens 2540 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2550 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The sixth lens 2560 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The seventh lens 2570 has a negative refractive power, and a paraxial region of each of an object-side surface and an image-side surface thereof is concave.

No inflection point is formed on the object-side surface of the seventh lens 2570.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2570. In particular, the image-side surface of the seventh lens 2570 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 49 , the stop is disposed at a distance of 0.872 mm from the object-side surface of the first lens 2510 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 25 listed in Table 57 that appears later in this application.

Table 49 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 49 , and Table 50 below shows aspherical surface coefficients of the lenses of FIG. 49 . Both surfaces of all of the lenses of FIG. 49 are aspherical.

TABLE 49 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.76028791 0.6171815 1.546 56.114 1.100 S2 14.12333348 0.025 1.040 S3 Second Lens 5.834118934 0.23 1.667 20.353 1.011 S4 3.122671446 0.3733379 0.919 S5 Third Lens -49.94173366 0.3798697 1.546 56.114 0.995 S6 -15.18699611 0.1809039 1.096 S7 Fourth Lens 23.36800299 0.3031664 1.667 20.353 1.124 S8 12.20982926 0.3354305 1.309 S9 Fifth Lens -4.394771982 0.4728905 1.546 56.114 1.471 S10 -1.598299305 0.025 1.698 S11 Sixth Lens -6.081499124 0.5446656 1.546 56.114 1.822 S12 -3.014533539 0.2724323 2.192 S13 Seventh Lens -6.149442968 0.42237 1.546 56.114 2.462 S14 1.636694252 0.1933361 2.880 S15 Filter Infinity 0.21 1.518 64.197 3.223 S16 Infinity 0.6544156 3.300 S17 Imaging Plane Infinity 3.728

TABLE 50 K A B C D E F G H J S1 -1.0054 0.02246 0.02216 -0.0696 0.16036 -0.2238 0.18065 -0.0791 0.01412 0 S2 -1.5097 -0.1275 0.3975 -0.6982 0.68012 -0.322 0.02875 0.02904 -0.0076 0 S3 6.02943 -0.163 0.45041 -0.8514 1.05249 -0.8203 0.42351 -0.138 0.0213 0 S4 -0.8846 -0.0449 0.03929 0.15739 -0.6934 1.31707 -1.3069 0.67995 -0.143 0 S5 0 -0.0513 -0.0193 -0.016 0.00429 0.00341 -0.0155 0.03192 -0.0128 0 S6 0 -0.1089 -0.0569 0.35761 -0.9255 1.19468 -0.8604 0.33221 -0.0547 0 S7 -7.5 -0.2139 -0.0107 0.17878 -0.1827 -0.1159 0.3046 -0.1897 0.04049 0 S8 -43.341 -0.1402 -0.061 0.2777 -0.4123 0.3523 -0.1857 0.05641 -0.0071 0 S9 -35.081 -0.0602 0.07357 -0.1046 0.10843 -0.0726 0.02553 -0.0041 0.00022 0 S10 -1.5734 0.16205 -0.2197 0.18955 -0.107 0.03959 -0.0091 0.00113 -6E-05 0 S11 0.51533 0.21373 -0.3167 0.23989 -0.1217 0.03837 -0.0069 0.00066 -3E-05 0 S12 -1.1466 0.19671 -0.2565 0.15417 -0.0532 0.01146 -0.0015 0.00012 -4E-06 0 S13 -0.9056 -0.0077 -0.2094 0.18829 -0.0749 0.01671 -0.0022 0.00015 -5E-06 0 S14 -1.2797 -0.2192 0.10065 -0.0338 0.00878 -0.0018 0.00026 -2E-05 1.3E-06 -3E-08

Twenty-Sixth Example

FIG. 51 is a view illustrating a twenty-sixth example of an optical imaging system, and FIG. 52 illustrates aberration curves of the optical imaging system of FIG. 51 .

The twenty-sixth example of the optical imaging system includes a first lens 2610, a second lens 2620, a third lens 2630, a fourth lens 2640, a fifth lens 2650, a sixth lens 2660, a seventh lens 2670, a filter 2680, an image sensor 2690, and a stop (not shown) disposed between the second lens 2620 and the third lens 2630.

The first lens 2610 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2620 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2630 has a positive refractive power, a paraxial region of an object-side surface thereof is concave. and a paraxial region of an image-side surface thereof is convex.

The fourth lens 2640 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2650 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2660 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 2670 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 2670. In particular, the object-side surface of the seventh lens 2670 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2670. In particular, the image-side surface of the seventh lens 2670 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 51 , the stop is disposed at a distance of 0.866 mm from the object-side surface of the first lens 2610 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 26 listed in Table 57 that appears later in this application.

Table 51 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 51 , and Table 52 below shows aspherical surface coefficients of the lenses of FIG. 51 . Both surfaces of all of the lenses of FIG. 51 are aspherical.

TABLE 51 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.882954913 0.5871918 1.546 56.114 1.050 S2 18.07331507 0.0491976 0.962 S3 Second Lens 4.599463678 0.23 1.667 20.353 0.934 S4 2.546377474 0.3929389 0.837 S5 Third Lens -21.75460448 0.2744632 1.546 56.114 1.100 S6 -13.51443301 0.0611157 1.106 S7 Fourth Lens 25.33486158 0.2655293 1.546 56.114 1.200 S8 25.33602848 0.3710469 1.285 S9 Fifth Lens 9.468188048 0.3930453 1.656 21.525 1.500 S10 5.10288098 0.3790363 1.754 S11 Sixth Lens 6.416223875 0.888499 1.546 56.114 2.041 S12 6.352062001 0.0460253 2.631 S13 Seventh Lens 1.966539749 0.8854198 1.536 55.656 3.050 S14 1.769884599 0.3097825 3.456 S15 Filter Infinity 0.21 1.518 64.197 3.768 S16 Infinity 0.65 3.829 S17 Imaging Plane Infinity 4.129

TABLE 52 K A B C D E F G H J S1 -0.1525 0.00346 0.00541 -0.0238 0.05874 -0.0925 0.08078 -0.0376 0.00687 0 S2 -36.188 -0.0554 0.19103 -0.4954 0.90918 -1.1194 0.84898 -0.3546 0.06168 0 S3 -0.1164 -0.0883 0.22642 -0.5273 0.9947 -1.274 1.01042 -0.4343 0.07596 0 S4 0.3326 -0.0462 0.09702 -0.2316 0.5455 -0.848 0.78539 -0.3759 0.07082 0 S5 51.7577 -0.0119 -0.0911 0.36173 -0.9067 1.38454 -1.3014 0.68351 -0.1493 0 S6 42.1637 0.0924 -0.5269 1.35579 -2.2584 2.50931 -1.8107 0.76109 -0.139 0 S7 -4.7579 0.13357 -0.5938 1.26101 -1.8115 1.7924 -1.1666 0.44267 -0.0728 0 S8 -3.4393 0.04714 -0.1842 0.28859 -0.3575 0.32734 -0.1971 0.06695 -0.0093 0 S9 -8.5449 -0.0502 -0.0588 0.15989 -0.2027 0.13981 -0.0542 0.01046 -0.0007 0 S10 -18.064 -0.044 -0.0734 0.14254 -0.1303 0.06906 -0.0217 0.00378 -0.0003 0 S11 -4.6497 0.06328 -0.1193 0.08822 -0.0426 0.01348 -0.0028 0.00037 -2E-05 0 S12 -50 0.03403 -0.0497 0.02457 -0.0072 0.00126 -0.0001 6.9E-06 -2E-07 0 S13 -2.4291 -0.1201 0.01667 0.00224 -0.0009 0.00011 -6E-06 1.3E-07 8.8E-10 0 S14 -1.0032 -0.1111 0.02485 -0.0032 -0.0001 0.00013 -2E-05 1.9E-06 -8E-08 1.4E-09

Twenty-Seventh Example

FIG. 53 is a view illustrating a twenty-seventh example of an optical imaging system, and FIG. 54 illustrates aberration curves of the optical imaging system of FIG. 53 .

The twenty-seventh example of the optical imaging system includes a first lens 2710, a second lens 2720, a third lens 2730, a fourth lens 2740, a fifth lens 2750, a sixth lens 2760, a seventh lens 2770, a filter 2780, an image sensor 2790, and a stop (not shown) disposed between the second lens 2720 and the third lens 2730.

The first lens 2710 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2720 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2730 has a positive refractive power, a paraxial region of an object-side surface thereof is concave, and a paraxial region of an image-side surface thereof is convex.

The fourth lens 2740 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2750 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2760 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 2770 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

Two inflection points are formed on the object-side surface of the seventh lens 2770. In particular, the object-side surface of the seventh lens 2770 is convex in the paraxial region, becomes concave in a region outside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2770. In particular, the image-side surface of the seventh lens 2770 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 53 , the stop is disposed at a distance of 0.904 mm from the object-side surface of the first lens 2710 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 27 listed in Table 57 that appears later in this application.

Table 53 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 53 , and Table 54 below shows aspherical surface coefficients of the lenses of FIG. 53 . Both surfaces of all of the lenses of FIG. 53 are aspherical.

TABLE 53 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 1.898698558 0.6486367 1.546 56.114 1.260 S2 7.35678597 0.025 1.216 S3 Second Lens 3.87893073 0.23 1.667 20.353 1.161 S4 2.762008891 0.3408168 1.053 S5 Third Lens -50.1241934 0.2818618 1.546 56.114 1.120 S6 -14.98893663 0.0597334 1.158 S7 Fourth Lens 12.04981408 0.269789 1.546 56.114 1.220 S8 12.56574443 0.2918619 1.320 S9 Fifth Lens 9.592575983 0.35 1.667 20.353 1.520 S10 5.27478585 0.3343756 1.762 S11 Sixth Lens 6.87350249 0.8484117 1.546 56.114 2.052 S12 7.493319886 0.0591105 2.641 S13 Seventh Lens 2.033708385 0.8835732 1.536 55.656 3.070 S14 1.843638917 0.3047846 3.425 S15 Filter Infinity 0.21 1.518 64.197 3.764 S16 Infinity 0.659116 3.825 S17 Imaging Plane Infinity 4.134

TABLE 54 K A B C D E F G H J S1 -0.1061 -0.0082 0.0469 -0.0925 0.08107 -0.0129 -0.032 0.02237 -0.0047 0 S2 -36.188 -0.0502 0.16245 -0.4029 0.69307 -0.7643 0.50209 -0.1789 0.02641 0 S3 0.0036 -0.0795 0.20571 -0.548 1.07416 -1.291 0.90975 -0.3412 0.05201 0 S4 0.40382 -0.0325 0.08844 -0.3009 0.70037 -0.9194 0.67381 -0.2424 0.03077 0 S5 51.7577 0.00548 -0.1746 0.50176 -0.9395 1.14417 -0.9144 0.4407 -0.0937 0 S6 42.1637 0.09529 -0.4992 1.03966 -1.2284 0.81694 -0.2802 0.03842 4E-06 0 S7 -4.7579 0.1185 -0.4938 0.85535 -0.8643 0.51674 -0.185 0.04168 -0.0054 0 S8 -3.4393 0.04916 -0.194 0.31472 -0.3773 0.32494 -0.1878 0.06297 -0.0088 0 S9 -8.5449 -0.0638 0.02895 -0.0884 0.16492 -0.171 0.09832 -0.0306 0.00409 0 S10 -18.064 -0.0543 -0.0172 0.03209 -0.0179 0.00397 4.6E-06 -0.0001 7.7E-06 0 S11 -4.6497 0.05354 -0.0909 0.06134 -0.0311 0.01102 -0.0026 0.00036 -2E-05 0 S12 -50 0.01031 -0.0176 0.00573 -0.0015 0.0003 -4E-05 2.4E-06 -6E-08 0 S13 -2.606 -0.1177 0.01922 -0.0004 -1E-04 -1E-05 4.5E-06 -4E-07 9.4E-09 0 S14 -1.0102 -0.0979 0.01866 -0.0024 0.00013 2.1E-05 -6E-06 5.9E-07 -3E-08 5.6E-10

Twenty-Eighth Example

FIG. 55 is a view illustrating a twenty-eighth example of an optical imaging system, and FIG. 56 illustrates aberration curves of the optical imaging system of FIG. 55 .

The twenty-eighth example of the optical imaging system includes a first lens 2810, a second lens 2820, a third lens 2830, a fourth lens 2840, a fifth lens 2850, a sixth lens 2860, a seventh lens 2870, a filter 2880, an image sensor 2890, and a stop (not shown) disposed between the second lens 2820 and the third lens 2830.

The first lens 2810 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The second lens 2820 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The third lens 2830 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fourth lens 2840 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The fifth lens 2850 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The sixth lens 2860 has a positive refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

The seventh lens 2870 has a negative refractive power, a paraxial region of an object-side surface thereof is convex, and a paraxial region of an image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventh lens 2870. In particular, the object-side surface of the seventh lens 2870 is convex in the paraxial region, and becomes concave toward an edge thereof.

In addition, one inflection point is formed on the image-side surface of the seventh lens 2870. In particular, the image-side surface of the seventh lens 2870 is concave in the paraxial region, and becomes convex toward an edge thereof.

Although not illustrated in FIG. 55 , the stop is disposed at a distance of 1.250 mm from the object-side surface of the first lens 2810 toward the imaging plane of the optical imaging system. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 28 listed in Table 57 that appears later in this application.

Table 55 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 55 , and Table 56 below shows aspherical surface coefficients of the lenses of FIG. 55 . Both surfaces of all of the lenses of FIG. 55 are aspherical.

TABLE 55 Surface No. Element Radius of Curvature Thickness/ Distance Index of Refraction Abbe Number Effective Aperture Radius S1 First Lens 2.281286206 0.4941042 1.546 56.114 1.640 S2 2.718984257 0.130834 1.629 S3 Second Lens 2.708968394 0.6 1.546 56.114 1.595 S4 37.24513877 0.025 1.593 S5 Third Lens 11.09599614 0.23 1.679 19.236 1.522 S6 4.325963413 0.4819872 1.450 S7 Fourth Lens 8.709066519 0.3517002 1.656 21.525 1.514 S8 14.98893268 0.4925536 1.555 S9 Fifth Lens 5.340621183 0.4256859 1.679 19.236 1.840 S10 2.972144757 0.1952429 2.415 S11 Sixth Lens 2.121089724 0.5425262 1.546 56.114 2.362 S12 4.981824211 0.4212041 2.717 S13 Seventh Lens 2.499873488 0.5046002 1.546 56.114 3.169 S14 1.479444218 0.222977 3.372 S15 Filter Infinity 0.21 1.518 64.197 3.779 S16 Infinity 0.6715509 3.848 S17 Imaging Plane Infinity 4.210

TABLE 56 K A B C D E F G H J S1 -0.9867 -0.0114 0.01114 -0.0538 0.09172 -0.0925 0.05422 -0.0183 0.00331 -0.0003 S2 -12.035 0.04793 -0.173 0.26373 -0.3194 0.25969 -0.1301 0.03858 -0.0062 0.00042 S3 -0.9455 -0.0107 -0.0528 0.10537 -0.1922 0.21871 -0.1388 0.04987 -0.0096 0.00078 S4 3.03842 -0.0418 0.21624 -0.5714 0.81428 -0.6941 0.36425 -0.1154 0.02022 -0.0015 S5 10.1638 -0.0842 0.25831 -0.5961 0.84391 -0.7413 0.40425 -0.1328 0.02406 -0.0018 S6 2.08088 -0.0648 0.14243 -0.2905 0.40945 -0.3776 0.22243 -0.0802 0.01628 -0.0014 S7 -13.097 -0.0215 -0.0518 0.14502 -0.2583 0.27772 -0.1843 0.07327 -0.0157 0.00138 S8 5.85919 -0.0435 0.0377 -0.0856 0.10737 -0.0887 0.04789 -0.0161 0.00312 -0.0003 S9 -43.521 -0.0279 0.02278 0.01043 -0.0468 0.04676 -0.0253 0.00785 -0.0013 9.2E-05 S10 -17.628 -0.0671 0.04256 -0.0048 -0.0103 0.00685 -0.0022 0.00038 -4E-05 1.4E-06 S11 -9.8081 0.04258 -0.1025 0.09185 -0.0514 0.01771 -0.0039 0.00056 -5E-05 1.6E-06 S12 -0.0695 0.00481 -0.0496 0.03792 -0.0164 0.00397 -0.0005 3.5E-05 -8E-07 -1E-08 S13 -0.6908 -0.2261 0.04088 0.01294 -0.0077 0.00168 -0.0002 1.5E-05 -6E-07 9.5E-09 S14 -1.419 -0.2123 0.09039 -0.0281 0.00628 -0.001 9.3E-05 -6E-06 1.8E-07 -2E-09

Table 57 below shows an overall focal length f of the optical imaging system, an overall length TTL of the optical imaging system (a distance along the optical axis from the object-side surface of the first lens to the imaging plane), a distance SL along the optical axis from the stop to the imaging plane, an f-number (F No.) of the optical imaging system (the overall focal length f of the optical imaging system divided by the diameter of an entrance pupil of the optical imaging system, where both f and the diameter of the entrance pupil are expressed in mm), an image height (IMG HT) on the imaging plane (one-half of a diagonal length of the imaging plane), and a field of view (FOV) of the optical imaging system for each of Examples 1-28 described herein. The values of f, TTL, SL, and IMG HT are expressed in mm. The values of F No. are dimensionless values. The values of FOV are expressed in degrees.

TABLE 57 Example f TTL SL F No. IMG HT FOV 1 4.824 6.000 5.071 1.51 4.000 78.10 2 4.803 6.000 5.046 1.48 4.000 78.40 3 4.650 5.400 4.423 1.80 4.000 80.00 4 4.804 5.750 4.688 1.60 3.930 77.10 5 4.780 5.827 4.402 1.57 4.050 79.02 6 3.950 4.819 3.650 1.58 3.250 77.47 7 4.350 5.300 4.917 1.58 3.384 79.58 8 4.020 4.901 4.565 1.58 3.400 79.28 9 4.784 5.787 5.364 1.58 4.000 78.52 10 4.280 5.100 4.369 1.71 3.535 77.84 11 4.450 5.400 4.669 1.69 3.261 71.28 12 4.144 5.026 4.299 1.58 3.261 75.78 13 4.401 5.300 4.142 1.69 3.728 79.31 14 4.511 5.500 4.420 1.66 3.728 77.85 15 4.823 5.865 4.687 1.66 3.728 73.38 16 4.447 5.144 4.894 2.07 3.528 75.63 17 4.400 5.200 4.576 1.81 3.261 72.55 18 3.994 5.125 4.484 1.57 3.261 77.38 19 4.390 5.260 4.310 1.67 3.528 76.69 20 4.340 5.260 4.320 1.62 3.528 76.91 21 4.020 4.940 3.938 1.58 3.226 76.00 22 4.594 5.600 4.855 1.72 4.200 83.44 23 4.498 5.500 4.250 1.63 3.728 78.01 24 4.586 5.461 4.510 1.79 3.728 76.96 25 4.302 5.240 4.368 1.95 3.728 80.46 26 4.966 5.993 5.127 2.36 4.128 78.45 27 4.667 5.797 4.893 1.85 4.128 81.80 28 4.870 6.000 4.750 1.48 4.200 80.29

Table 58 below shows in mm a focal length f1 of the first lens, a focal length f2 of the second lens, a focal length f3 of the third lens, a focal length f4 of the fourth lens, a focal length f5 of the fifth lens, a focal length f6 of the sixth lens, and a focal length f7 of the seventh lens for each of Examples 1-28 described herein.

TABLE 58 Example f1 f2 f3 f4 f5 f6 f7 1 4.756 -12.434 26.345 -55.140 -12.854 2.765 -2.459 2 4.773 -12.361 26.634 -55.618 -12.673 2.699 -2.432 3 4.178 -8.893 18.275 37.848 -15.676 30.527 -16.070 4 4.277 -10.455 21.003 35.561 -16.519 80.332 -15.182 5 10.035 5.292 -7.613 22346862.05 86.584 -27.728 146.074 6 8.409 4.355 -6.520 -4512.292 74.369 -22.452 1842.731 7 -64.233 3.248 -7.428 -43.722 52.425 3.010 -2.424 8 -38.662 2.911 -6.813 -43.728 59.023 2.640 -2.116 9 -104.603 3.650 -8.142 -56.419 57.869 3.443 -2.762 10 3.596 -7.349 -1245 15.657 -19.723 2.662 -2.171 11 3.631 -7.630 -365 15.385 -24.532 2.360 -1.874 12 3.570 -7.440 -291.941 16.218 -22.370 2.450 -2.041 13 9.952 4.985 -9.042 -60.959 28.461 -19.130 -36.205 14 12.217 6.017 -9.925 25.358 28.723 -32.884 -16.737 15 13.664 6.556 -11.435 32.295 28.328 -36.885 -22.967 16 3.626 -6.978 10.551 125.381 -28.155 -367.720 -9.031 17 4.290 -10.606 30.978 14.871 -21.133 3.784 -2.465 18 5.677 -73.551 -122.716 15.510 207.375 3.799 -2.466 19 3.840 -10.270 -55.690 10.940 -17.400 -800 -16.450 20 3.840 -10.270 -55.930 10.930 -17.430 -800 -17.560 21 4.858 13.152 -8.241 -32.625 34.583 2.462 -2.100 22 4.030 -10.672 72.926 83.723 4.620 19.296 -2.686 23 20.370 4.011 -7.669 107.453 -23.005 189.703 54.850 24 3.808 -9.408 -530.750 22.837 -27.105 -22.324 66.015 25 3.620 -10.428 39.821 -38.762 4.342 10.303 -2.323 26 3.802 -8.955 64.595 12384.769 -17.503 299.093 57.797 27 4.499 -15.674 39.058 453.779 -18.160 102.612 59.134 28 18.537 5.313 -10.580 30.673 -10.636 6.334 -8.036

Table 59 below shows in mm a thickness (L1edgeT) of an edge of the first lens, a thickness (L2edgeT) of the edge of the second lens, a thickness (L3edgeT) of the edge of the third lens, a thickness (L4edgeT) of the edge of the fourth lens, a thickness (L5edgeT) of the edge of the fifth lens, a thickness (L6edgeT) of the edge of the sixth lens, and a thickness (L7edgeT) of the edge of the seventh lens for each of Examples 1-28 described herein.

TABLE 59 Example L1edgeT L2edgeT L3edgeT L4edgeT L5edgeT L6edgeT L7edgeT 1 0.271 0.346 0.259 0.354 0.283 0.265 0.818 2 0.271 0.342 0.266 0.339 0.283 0.266 0.806 3 0.255 0.312 0.260 0.261 0.275 0.395 0.447 4 0.226 0.349 0.220 0.222 0.283 0.752 0.546 5 0.282 0.313 0.416 0.237 0.325 0.371 0.382 6 0.233 0.259 0.333 0.203 0.272 0.330 0.376 7 0.220 0.270 0.348 0.224 0.259 0.269 0.437 8 0.194 0.250 0.328 0.211 0.239 0.222 0.388 9 0.246 0.297 0.392 0.244 0.286 0.286 0.301 10 0.222 0.377 0.235 0.240 0.189 0.260 0.323 11 0.172 0.340 0.207 0.355 0.401 0.262 0.680 12 0.163 0.350 0.257 0.281 0.193 0.260 0.446 13 0.257 0.255 0.340 0.276 0.365 0.307 0.278 14 0.253 0.255 0.486 0.252 0.361 0.490 0.409 15 0.286 0.336 0.498 0.261 0.427 0.497 0.489 16 0.269 0.308 0.190 0.230 0.410 0.714 0.300 17 0.205 0.407 0.201 0.333 0.278 0.348 0.815 18 0.218 0.347 0.211 0.259 0.277 0.251 0.950 19 0.190 0.220 0.230 0.320 0.210 0.570 0.700 20 0.170 0.230 0.240 0.250 0.230 0.590 0.770 21 0.212 0.210 0.351 0.213 0.236 0.357 0.445 22 0.243 0.339 0.258 0.397 0.274 0.340 0.567 23 0.267 0.396 0.384 0.400 0.228 0.589 0.342 24 0.231 0.289 0.255 0.254 0.360 0.476 0.658 25 0.252 0.293 0.238 0.374 0.258 0.415 0.686 26 0.293 0.298 0.252 0.251 0.409 0.715 0.678 27 0.246 0.280 0.254 0.273 0.356 0.630 0.692 28 0.252 0.160 0.429 0.302 0.430 0.391 0.433

Table 60 below shows in mm a sag value (L5S1 sag) at an outer end of the optical portion of the object-side surface of the fifth lens, a sag value (L5S2 sag) at an outer end of the optical portion of the image-side surface of the fifth lens, a thickness (Yc71P1) of the seventh lens at a first inflection point on the object-side surface of the seventh lens, a thickness (Yc71P2) of the seventh lens at a second inflection point on the object-side surface of the seventh lens, and a thickness (Yc72P1) of the seventh lens at a first inflection point on the image-side surface of the seventh lens for each of Examples 1-28 described herein.

TABLE 60 Example L5S1 sag L5S2 sag Yc71P1 Yc71P2 Yc72P1 1 -0.447 -0.533 1.324 - 0.931 2 -0.426 -0.531 1.329 - 0.929 3 -0.392 -0.434 0.613 0.621 0.71 4 -0.404 -0.356 0.837 0.815 0.946 5 0.197 0.199 0.678 0.803 0.795 6 0.200 0.202 0.568 0.67 0.667 7 0.115 0.139 0.93 - 0.811 8 0.123 0.129 0.859 - 0.769 9 0.162 0.188 0.969 - 0.881 10 -0.466 -0.526 2.933 - 4.142 11 -0.479 -0.556 3.24 - 4.484 12 -0.453 -0.501 2.843 - 4.129 13 0.210 0.245 0.569 0.641 0.67 14 0.102 0.142 0.562 - 0.686 15 0.054 0.053 0.607 - 0.717 16 -0.261 -0.263 0.473 - 0.631 17 -0.485 -0.407 0.89 - 0.92 18 -0.479 -0.422 - - 0.781 19 -0.410 -0.430 0.8 - 1.28 20 -0.420 -0.430 0.81 - 1.27 21 -0.301 -0.528 0.849329 - 0.717966 22 0.508 0.780 - - 0.888 23 0.176 0.302 0.595 - 0.672 24 0.280 0.281 0.883 0.915 0.988 25 0.276 0.509 - - 0.968 26 0.092 0.103 0.955 1.103 1.128 27 0.179 0.173 0.964 1.114 1.13 28 0.261 0.256 0.587 - 0.763

Table 61 below shows in mm an inner diameter of each of the first to seventh spacers for each of Examples 1-28 described herein. S1d is an inner diameter of the first spacer SP1, S2d is an inner diameter of the second spacer SP2, S3d is an inner diameter of the third spacer SP3, S4d is an inner diameter of the fourth spacer SP4, S5d is an inner diameter of the fifth spacer SP5, S6d is an inner diameter of the sixth spacer SP6, and S7d is an inner diameter of the seventh spacer SP7.

TABLE 61 Example S1d S2d S3d S4d S5d S6d S7d 1 2.84 2.53 2.87 3.35 4.18 6.11 - 2 2.44 2.16 2.25 2.93 4.08 5.53 - 3 2.44 2.16 2.25 2.93 4.08 5.53 - 4 2.86 2.52 2.42 2.72 3.38 5.82 - 5 1.5 1.34 1.32 1.72 2.31 3.03 - 6 1.24 1.15 1.03 1.48 1.9 2.46 - 7 1.34 1.23 1.03 1.5 1.98 2.66 - 8 1.25 1.14 0.94 1.5 1.86 2.44 - 9 1.49 1.39 1.16 1.7 2.21 2.95 - 10 2.31 2.16 2.54 2.94 4.06 4.84 5.12 11 2.46 2.26 2.53 2.86 3.63 4.47 4.79 12 2.47 2.21 2.53 2.79 3.78 4.51 - 13 2.58 2.4 2.49 2.97 4.16 4.89 5.51 14 2.59 2.5 2.53 2.9 3.8 4.9 - 15 2.77 2.61 2.79 3.12 4.03 4.89 - 16 2.12 2.1 2.04 2.12 2.81 4.64 - 17 2.32 2.36 2.56 2.93 3.7 4.35 - 18 2.41 2.3 2.66 3.03 3.76 - - 19 2.314 1.98 2.298 2.776 3.232 4.828 - 20 2.49 2.02 2.27 2.48 2.03 4.71 - 21 2.42 2.23 2.07 2.41 3.08 4.23 - 22 2.52 2.31 2.56 3.45 4.66 5.67 - 23 2.71 2.53 2.52 3.03 3.78 4.83 - 24 2.36 2.03 2.25 2.65 3.64 5.14 5.3 25 2.06 1.89 2.15 2.7 3.61 4.56 4.84 26 1.89 1.84 2.33 2.73 3.73 5.43 6.03 27 2.39 2.15 2.4 2.82 3.94 5.68 6.02 28 3.22 3.11 2.92 3.25 4.6 5.6 6.15

Table 62 below shows in mm³ a volume of each of the first to seventh lenses for each of Examples 1-28 described herein. L1v is a volume of the first lens, L2v is a volume of the second lens, L3v is a volume of the third lens, L4v is a volume of the fourth lens, L5v is a volume of the fifth lens, L6v is a volume of the sixth lens, and L7v is a volume of the seventh lens.

TABLE 62 Example L1v L2v L3v L4v L5v L6v L7v 1 9.275 5.4262 7.6682 9.6317 13.3855 16.9502 47.3187 2 10.25668 6.2334 7.9096 10.6038 13.1472 15.6863 47.1347 3 5.1971 5.216 5.7114 7.6743 11.4157 17.3987 26.6851 4 7.0224 7.0394 5.8013 7.8824 11.1935 36.4427 34.1183 5 8.0184 9.5628 9.6052 8.4128 12.0326 16.7196 28.0267 6 6.3442 6.9494 7.7597 6.2076 6.8959 10.3364 16.5597 7 5.7249 8.0179 8.3774 7.9589 10.3434 11.1031 27.1511 8 5.0799 5.7347 5.8704 6.465 6.7471 7.523 21.0455 9 6.8734 9.0897 9.3053 8.2626 10.8967 13.6572 31.8443 10 5.2342 5.0595 5.1455 4.1402 5.9856 8.1378 19.6812 11 4.9213 4.3965 4.4008 5.9124 9.5127 7.6205 23.7487 12 5.2239 4.9915 5.6183 5.5026 5.5766 7.2491 20.0822 13 5.639 4.858 6.6748 7.1627 11.0369 11.9357 27.1217 14 5.1778 5.1427 8.2986 6.3777 12.6369 14.9811 20.731 15 5.9227 6.9971 9.1275 7.025 12.2307 15.4792 23.2093 16 3.8115 4.6714 4.0552 5.0631 11.2844 25.7618 16.5646 17 4.2347 5.5368 5.5931 7.5471 9.4202 8.9992 27.3258 18 4.6529 4.6572 6.2312 6.7131 10.2673 11.7401 33.5372 19 5.7312 3.6543 4.1957 9.084 7.949 27.8626 30.6587 20 5.4092 4.6711 5.1562 7.663 8.7343 28.0075 34.4019 21 3.7681 3.4595 4.0278 5.0067 6.9793 11.3507 18.8879 22 6.1739 5.7042 6.968 11.8343 12.9092 21.1543 39.7461 23 4.9598 8.122 7.2222 8.2929 8.6024 18.837 19.7464 24 5.4854 3.9796 4.1274 4.6927 9.8848 20.3357 35.3318 25 3.81 3.9751 3.9272 6.1885 7.516 13.0347 31.8586 26 4.7517 4.3655 6.4562 5.0723 9.8674 36.8705 47.4701 27 5.6273 4.949 5.1423 5.0791 9.3624 31.5832 47.9081 28 7.5192 7.1322 12.3605 9.0385 17.2925 20.5539 33.5701

Table 63 below shows in mg a weight of each of the first to seventh lenses for each of Examples 1-28 described herein. L1w is a weight of the first lens, L2w is a weight of the second lens, L3w is a weight of the third lens, L4w is a weight of the fourth lens, L5w is a weight of the fifth lens, L6w is a weight of the sixth lens, and L7w is a weight of the seventh lens.

TABLE 63 Example L1w L2w L3w L4w L5w L6w L7w 1 9.646 6.674 7.975 11.847 16.732 17.628 49.211 2 10.667 7.667 8.226 13.043 16.434 16.314 49.020 3 5.405 6.416 5.940 7.981 14.270 21.748 26.952 4 7.303 8.658 6.033 8.198 13.992 45.553 34.459 5 8.339 9.945 12.007 10.516 12.514 20.900 28.307 6 6.598 7.227 9.700 7.760 7.172 12.921 16.725 7 5.954 8.339 10.472 9.710 12.619 11.547 28.237 8 5.283 5.964 7.338 7.887 8.231 7.824 21.887 9 7.148 9.453 11.632 10.080 13.294 14.203 33.118 10 5.444 6.223 5.351 4.306 7.362 8.463 20.468 11 5.118 5.408 4.577 6.149 11.701 7.925 24.699 12 5.433 6.140 5.843 5.723 6.859 7.539 20.885 13 5.865 5.052 8.344 8.953 11.478 14.920 27.393 14 5.385 5.348 10.373 6.633 13.142 15.580 21.560 15 6.160 7.277 11.409 7.306 12.720 19.349 24.138 16 3.964 5.746 4.217 5.266 14.106 26.792 17.227 17 4.404 6.810 5.817 7.849 11.587 9.359 28.419 18 4.839 5.728 6.480 6.982 12.629 12.210 34.879 19 5.960 4.495 5.161 9.447 9.936 34.828 30.965 20 5.626 5.745 6.342 7.970 10.918 35.009 34.746 21 3.919 3.598 4.954 5.207 8.724 11.805 19.643 22 6.421 7.016 7.247 14.556 13.426 22.000 41.336 23 5.158 8.447 9.028 10.366 8.946 19.590 20.536 24 5.705 4.895 5.077 4.880 12.356 25.420 35.685 25 3.962 4.889 4.084 7.612 7.817 13.556 33.133 26 4.942 5.370 6.714 5.275 12.334 38.345 47.945 27 5.852 6.087 5.348 5.282 11.516 32.847 48.387 28 7.819968 7.417488 15.45063 11.29813 21.61563 21.37606 34.9129

Table 64 below shows in mm an overall outer diameter (including a rib) of each of the first to seventh lenses for each of Examples 1-28 described herein. L1TR is an overall outer diameter of the first lens, L2TR is an overall outer diameter of the second lens, L3TR is an overall outer diameter of the third lens, L4TR is an overall outer diameter of the fourth lens, L5TR is an overall outer diameter of the fifth lens, L6TR is an overall outer diameter of the sixth lens, and L7TR is an overall outer diameter of the seventh lens.

TABLE 64 Example L1TR L2TR L3TR L4TR L5TR L6TR L7TR 1 4.73 4.93 5.43 6.03 7 7.4 7.6 2 5.02 5.22 5.52 6.32 6.94 7.34 7.54 3 4.22 4.42 4.72 5.52 6.44 6.84 7.04 4 4.82 5.02 5.32 6.02 6.74 7.14 7.34 5 2.44 2.54 2.69 2.9 3.19 3.44 3.62 6 2.29 2.4 2.54 2.63 2.78 2.91 3.04 7 2.46 2.58 2.69 2.8 3.17 3.31 3.47 8 2.19 2.32 2.44 2.57 2.74 3 3.11 9 2.37 2.5 2.65 2.75 3.04 3.44 3.54 10 4.22 4.42 4.54 4.72 5.4 5.74 6.3 11 4.08 4.23 4.36 4.53 5.11 5.56 6.15 12 4.33 4.53 4.66 4.92 5.09 5.72 5.97 13 4.21 4.3 4.44 4.84 5.47 6.12 6.9 14 4.25 4.34 4.48 4.88 5.51 6.16 6.48 15 4.43 4.52 4.66 5.06 5.5 6.26 6.58 16 3.51 3.81 4.39 4.98 5.85 6.15 6.25 17 3.93 4.13 4.71 6.17 5.3 6.57 6.67 18 4.03 4.23 4.81 5.4 6.27 6.67 6.77 19 4.228 4.402 4.87 5.476 6.332 6.714 6.92 20 4.26 4.46 5.03 5.62 6.5 6.9 7.1 21 3.83 4.03 4.23 4.83 5.32 5.72 5.92 22 4.63 4.93 5.23 6.03 6.92 7.32 7.52 23 4.29 4.38 4.52 4.92 5.65 6.26 6.77 24 4.09 4.18 4.3 4.53 5.22 6.62 7.32 25 3.73 3.82 3.96 4.39 4.96 6 6.86 26 3.97 4.06 4.19 4.63 5.2 7.15 8.02 27 4.39 4.48 4.61 5.04 5.61 7.09 7.95 28 4.87 4.96 5.09 5.52 6.37 7.41 7.84

Table 65 below shows in mm a maximum thickness of the rib of each of the first to seventh lenses for each of Examples 1-28 described herein. The maximum thickness of the rib is a thickness of a portion of the rib in contact with a spacer. L1 rt is a maximum thickness of the rib of the first lens, L2rt is a maximum thickness of the rib of the second lens, L3rt is a maximum thickness of the rib of the third lens, L4rt is a maximum thickness of the rib of the fourth lens, L5rt is a maximum thickness of the rib of the fifth lens, L6rt is a maximum thickness of the rib of the sixth lens, and L7rt is a maximum thickness of the rib of the seventh lens.

TABLE 65 Example L1rt L2rt L3rt L4rt L5rt L6rt L7rt 1 0.61 0.37 0.33 0.32 0.37 0.465 0.895 2 0.585 0.395 0.34 0.41 0.305 0.343 0.91 3 0.435 0.425 0.39 0.41 0.345 0.375 0.53 4 0.435 0.495 0.22 0.29 0.325 0.81 0.595 5 0.6 0.58 0.56 0.47 0.34 0.4 0.47 6 0.54 0.5 0.52 0.42 0.21 0.39 0.4 7 0.39 0.44 0.47 0.36 0.42 0.38 0.47 8 0.54 0.37 0.41 0.33 0.37 0.27 0.42 9 0.6 0.51 0.55 0.35 0.46 0.47 0.52 10 0.435 0.43 0.36 0.215 0.32 0.33 0.405 11 0.42 0.42 0.36 0.31 0.45 0.36 0.7 12 0.41 0.41 0.37 0.37 0.29 0.33 0.52 13 0.55 0.38 0.58 0.41 0.5 0.32 0.53 14 0.49 0.39 0.68 0.36 0.63 0.49 0.48 15 0.49 0.47 0.71 0.47 0.56 0.5 0.55 16 0.482 0.395 0.316 0.328 0.422 0.885 0.409 17 0.431 0.556 0.361 0.429 0.38 0.38 0.667 18 0.431 0.457 0.361 0.364 0.38 0.334 0.729 19 0.457 0.314 0.315 0.345 0.276 0.741 0.774 20 0.431 0.408 0.319 0.369 0.252 0.674 0.798 21 0.39 0.33 0.3 0.26 0.425 0.55 0.534 22 0.43 0.41 0.35 0.48 0.305 0.57 0.71 23 0.48 0.56 0.58 0.47 0.34 0.62 0.44 24 0.51 0.25 0.32 0.32 0.51 0.53 0.72 25 0.4 0.42 0.37 0.5 0.32 0.46 0.72 26 0.47 0.41 0.45 0.41 0.47 0.93 0.7 27 0.44 0.39 0.4 0.4 0.38 0.74 0.72 28 0.56 0.41 0.56 0.54 0.52 0.44 0.54

FIG. 60 is a cross-sectional view illustrating an example of a seventh lens.

FIG. 60 illustrates the overall outer diameter (L7TR) of the seventh lens, the thickness (L7 rt) of the flat portion of the rib of the seventh lens, the thickness (L7 edgeT) of the edge of the seventh lens, the thickness (Yc 71P1) of the seventh lens at the first inflection point on the object-side surface of the seventh lens, the thickness (Yc 71P2) of the seventh lens at the second inflection point on the object-side surface of the seventh lens, and the thickness (Yc 72P1) of the seventh lens at the first inflection point on the image-side surface of the seventh lens.

The examples described above enable the optical imaging system to be miniaturized and aberrations to be easily corrected to achieve high resolution.

While this disclosure includes specific examples, it will be apparent after an understanding of the disclosure of this application that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure. 

What is claimed is:
 1. An optical imaging system comprising: a first lens having a positive refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof; a second lens having a negative refractive power, a convex object-side surface in a paraxial region thereof, and a concave image-side surface in a paraxial region thereof; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power, wherein the first to seventh lenses are sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, at least one inflection point is formed on either one or both of an object-side surface of the seventh lens and an image-side surface of the seventh lens, the optical imaging system has a total of seven lenses having a refractive power, and 0.01 < R1/R4 < 1.3 is satisfied, where R1 is a radius of curvature of the object-side surface of the first lens at the optical axis, R4 is a radius of curvature of the image-side surface of the second lens at the optical axis, and R1 and R4 are expressed in a same unit of measurement.
 2. The optical imaging system of claim 1, wherein 0.6 < (R11+R14)/(2*R1) < 3.0 is satisfied, where R11 is a radius of curvature of an object-side surface of the sixth lens at the optical axis, R14 is a radius of curvature of the image-side surface of the seventh lens at the optical axis, and R1, R11, and R14 are expressed in a same unit of measurement.
 3. The optical imaging system of claim 1, wherein 0.1 < (1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f < 0.8 is satisfied, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f is an overall focal length of the optical imaging system, and f1, f2, f3, f4, f5, f6, f7, and f are expressed in a same unit of measurement.
 4. The optical imaging system of claim 1, wherein 0.1 < (1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL < 1.0 is satisfied, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane, and f1, f2, f3, f4, f5, f6, f7, and TTL are expressed in a same unit of measurement.
 5. The optical imaging system of claim 1, wherein 0.2 < TD1/D67< 0.8 is satisfied, where TD1 is a thickness along the optical axis of the first lens, D67 is a distance along the optical axis from an object-side surface of the sixth lens to the image-side surface of the seventh lens, and TD1 and D67 are expressed in a same unit of measurement.
 6. The optical imaging system of claim 5, wherein 0.4 < ΣTD/TTL < 0.7 is satisfied, where ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses, TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane, and ΣTD and TTL are expressed in a same unit of measurement.
 7. The optical imaging system of claim 6, wherein 0.6 < TTL/(2*IMG HT) < 0.9 is satisfied, where IMG HT is one half of a diagonal length of the imaging plane, and TTL and IMG HT are expressed in a same unit of measurement.
 8. The optical imaging system of claim 7, wherein 0.2 < ΣSD/ΣTD < 0.7 is satisfied, where ΣSD is a sum of air gaps along the optical axis between the first to seventh lenses, and ΣSD and ΣTD are expressed in a same unit of measurement.
 9. The optical imaging system of claim 1, wherein the optical imaging system satisfies SD56 < SD67, where SD56 is a distance along the optical axis from an image-side surface of the fifth lens to an object-side surface of the sixth lens, SD67 is a distance along the optical axis from an image-side surface of the sixth lens to the object-side surface of the seventh lens, and SD56 and SD67 are expressed in a same unit of measurement.
 10. The optical imaging system of claim 9, wherein the optical imaging system satisfies SD12 < SD34, where SD12 is a distance along the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, SD34 is a distance along the optical axis from an image-side surface of the third lens to an object-side surface of the fourth lens, and SD12 and SD34 are expressed in a same unit of measurement.
 11. The optical imaging system of claim 10, wherein the optical imaging system satisfies SD56 < SD34, where SD34 and SD56 are expressed in a same unit of measurement.
 12. The optical imaging system of claim 1, wherein the fourth lens has a concave image-side surface in a paraxial region thereof, the sixth lens has a convex object-side surface in a paraxial region thereof, and the seventh lens has a concave image-side surface in a paraxial region thereof.
 13. The optical imaging system of claim 1, wherein the third lens has a convex image-side surface in a paraxial region thereof, and the fourth lens has a convex object-side surface in a paraxial region thereof.
 14. The optical imaging system of claim 1, wherein the fourth lens has a convex object-side surface in a paraxial region thereof and a concave image-side surface in a paraxial region thereof.
 15. The optical imaging system of claim 14, wherein the third lens has a concave object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof.
 16. The optical imaging system of claim 15, wherein the fifth lens has a concave object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof. 